2014/10/15 下午 10:15:39

iphone Programming Glossary: using

How to check for an active Internet Connection on iPhone SDK?

http://stackoverflow.com/questions/1083701/how-to-check-for-an-active-internet-connection-on-iphone-sdk

on iPhone SDK I would like to check to see if I have an Internet connection on the iPhone using the Cocoa Touch libraries. I came up with a way to do this using an NSURL . The way I did it seems a.. Internet connection on the iPhone using the Cocoa Touch libraries. I came up with a way to do this using an NSURL . The way I did it seems a bit unreliable because even Google could one day be down and relying.. broke the internet internetReachableFoo startNotifier METHOD 2 Do it yourself the old way using Apple's outdated Reachability class 1 Add SystemConfiguration framework to the project but don't worry..

How to programmatically send SMS on the iPhone?

http://stackoverflow.com/questions/10848/how-to-programmatically-send-sms-on-the-iphone

prepopulate the SMS fields then the user can initiate the SMS send within the controller. Unlike using the sms ... url format this allows your application to stay open and allows you to populate both the.. iPad except perhaps under iOS 5. You must either detect the device and iOS limitations prior to using this controller or risk restricting your app to recently upgraded 3G 3GS and 4 iPhones. However an intermediate..

How to make a UITextField move up when keyboard is present

http://stackoverflow.com/questions/1126726/how-to-make-a-uitextfield-move-up-when-keyboard-is-present

where I change the frame size of the UIScrollView when the keyboard goes up and down. I'm simply using void textFieldDidBeginEditing UITextField textField Keyboard becomes visible scrollView.frame CGRectMake..

iOS 6 apps - how to deal with iPhone 5 screen size? [duplicate]

http://stackoverflow.com/questions/12396545/ios-6-apps-how-to-deal-with-iphone-5-screen-size

points in height would simply be black. If you only plan to support iOS 6 then definitely consider using Auto Layout. It removes all fixed layout handling and instead uses constraints to lay things out. Nothing..

Symbolicating iPhone App Crash Reports

http://stackoverflow.com/questions/1460892/symbolicating-iphone-app-crash-reports

receive from APPLE into a FOLDER. OPEN terminal application and go to the folder created above using CD command atos arch armv7 o YOURAPP.app YOURAPP MEMORY_LOCATION_OF_CRASH. The memory location should..

How do I detect when someone shakes an iPhone?

http://stackoverflow.com/questions/150446/how-do-i-detect-when-someone-shakes-an-iphone

view with only these methods and then selecting this new type instead of the base type in IB or using it when allocating a view . In the view controller you want to set this view to become first responder..

Programmatically get own phone number in iOS

http://stackoverflow.com/questions/193182/programmatically-get-own-phone-number-in-ios

response violates the latest SDK Agreement as of Nov 5 2009. Our application was just rejected for using it. Here's the response from Apple For security reasons iPhone OS restricts an application including..

How do I associate file types with an iPhone application?

http://stackoverflow.com/questions/2774343/how-do-i-associate-file-types-with-an-iphone-application

box they arrived in. You can get the URL for this file within the application delegate method using code like the following NSURL url NSURL launchOptions valueForKey UIApplicationLaunchOptionsURLKey Note.. approach we used for handling custom URL schemes. You can separate the file URLs from others by using code like the following if url isFileURL Handle file being passed in else Handle custom URL scheme ..

Check iPhone iOS Version

http://stackoverflow.com/questions/3339722/check-iphone-ios-version

How can I do this iphone version ios share improve this question You can get the OS version using UIDevice currentDevice systemVersion However you should avoid relying on the version string as an indication.. is available. For example you can check if UIPopoverController is available on the current device using NSClassFromString if NSClassFromString @ UIPopoverController Do something Some classes like CLLocationManager..

Prefixing property names with an underscore in Objective C [duplicate]

http://stackoverflow.com/questions/3521254/prefixing-property-names-with-an-underscore-in-objective-c

confuse when you're accessing a property or when you're accessing its backing ivar directly though using the 2.0 dot access to properties does make it more possible. Using the standard message passing syntax..

Can I embed a custom font in an iPhone application?

http://stackoverflow.com/questions/360751/can-i-embed-a-custom-font-in-an-iphone-application

a bounty for this question and I will award the bounty to the first person who provides an answer using only documented APIs who responds with sufficient information to get this working on the device. Working..

How do I create delegates in Objective-C?

http://stackoverflow.com/questions/626898/how-do-i-create-delegates-in-objective-c

it probably has code similar to this to see if the delegate responds to the windowDidMove message using respondsToSelector and send it if appropriate. if self delegate respondsToSelector @selector windowDidMove..

UIDevice uniqueIdentifier Deprecated - What To Do Now?

http://stackoverflow.com/questions/6993325/uidevice-uniqueidentifier-deprecated-what-to-do-now

app you can call the CFUUIDCreate function to create a UUID and write it to the defaults database using the NSUserDefaults class. However this value won't be the same if a user uninstalls and re installs.. So this major point doesn't get lost in the comment noise do not use the MAC as UUID create a hash using the MAC . That hash will always create the same result every time even across reinstalls and apps if..

Difference between objectForKey and valueForKey?

http://stackoverflow.com/questions/1062183/difference-between-objectforkey-and-valueforkey

newAccount setAccountNumber anAccountNUmber NSNumber anotherAccountNumber newAccount accountNumber Using KVC I can access the property dynamically NSNumber anAccountNumber NSNumber numberWithInt 12345 Account..

How to change the device orientation programmatically in iOS 6

http://stackoverflow.com/questions/12650137/how-to-change-the-device-orientation-programmatically-in-ios-6

UIInterfaceOrientationMaskLandscapeRight UIInterfaceOrientationMask Using shouldAutorotateToInterfaceOrientation method BOOL shouldAutorotateToInterfaceOrientation UIInterfaceOrientation.. toInterfaceOrientation return UIInterfaceOrientationIsLandscapeRight toInterfaceOrientation Using supportedInterfaceOrientations method NSUInteger supportedInterfaceOrientations return UIInterfaceOrientationMaskLandscapeRight..

Where to place the “Core Data Stack” in a Cocoa/Cocoa Touch application

http://stackoverflow.com/questions/1267520/where-to-place-the-core-data-stack-in-a-cocoa-cocoa-touch-application

for a view controller is therefore usually a managed object context otherwise a managed object. Using and passing a singleton object that manages a stack and from which you retrieve a context typically..

How do I change the Navigation Bar color in iOS 7?

http://stackoverflow.com/questions/18929864/how-do-i-change-the-navigation-bar-color-in-ios-7

Using SSL in an iPhone App - Export Compliance

http://stackoverflow.com/questions/2128927/using-ssl-in-an-iphone-app-export-compliance

SSL in an iPhone App Export Compliance I'm looking at creating an iPhone app that will communicate..

Objective-C - When to use 'self'

http://stackoverflow.com/questions/2385980/objective-c-when-to-use-self

to the same instance variable. iphone objective c cocoa touch share improve this question Using self causes your class' setter for this variable to be called rather than changing the ivar directly...

Using the apple FFT and accelerate Framework

http://stackoverflow.com/questions/3398753/using-the-apple-fft-and-accelerate-framework

the apple FFT and accelerate Framework Has anybody used the apple FFT for an iPhone app yet or know..

Prefixing property names with an underscore in Objective C [duplicate]

http://stackoverflow.com/questions/3521254/prefixing-property-names-with-an-underscore-in-objective-c

backing ivar directly though using the 2.0 dot access to properties does make it more possible. Using the standard message passing syntax makes intent more explicit IMO. @interface Foo NSObject NSNumber..

parsing HTML on the iPhone [closed]

http://stackoverflow.com/questions/405749/parsing-html-on-the-iphone

messy HTML. Hpple project is a Objective C wrapper on the XPathQuery library for parsing HTML. Using it you can send an XPath query and receive the result . Requirements Add libxml2 includes to your project..

Gradients on UIView and UILabels On iPhone [duplicate]

http://stackoverflow.com/questions/422066/gradients-on-uiview-and-uilabels-on-iphone

text in either a View or Label but the back ground must be a gradient as opposed to a true color. Using a graphics program to create desired look is no good as the text may vary depending on data returned..

iOS SDK - Programmatically generate a PDF file

http://stackoverflow.com/questions/4362734/ios-sdk-programmatically-generate-a-pdf-file

SDK Programmatically generate a PDF file Using the CoreGraphics framework is tedious work in my honest opinion when it comes to programmatically drawing..

iPhone - Backgrounding to poll for events

http://stackoverflow.com/questions/4656214/iphone-backgrounding-to-poll-for-events

And terminate the task if you don't need it anymore. For my own experience I measured something. Using the location callbacks with having the GPS radio on is sucking my battery down very quickly. Using the.. Using the location callbacks with having the GPS radio on is sucking my battery down very quickly. Using the approach which I posted in Update 2 is taking nearly no energy. According to the userexperience..

Return to app behavior after phone call different in native code than UIWebView

http://stackoverflow.com/questions/5317783/return-to-app-behavior-after-phone-call-different-in-native-code-than-uiwebview

calling UIApplication openURL with a tel URL and clicking a link to the same URL in a UIWebView . Using a UIWebView instead of a UILabel might have some downsides but you don't have to actually display the..

What's the best way to communicate between view controllers?

http://stackoverflow.com/questions/569940/whats-the-best-way-to-communicate-between-view-controllers

of using the dependency injection pattern with a controller below in case it's helpful. Example of Using Dependency Injection with a View Controller Let's say you're building a screen in which several books..

Create singleton using GCD's dispatch_once in Objective C

http://stackoverflow.com/questions/5720029/create-singleton-using-gcds-dispatch-once-in-objective-c

singleton using GCD's dispatch_once in Objective C If you can target iOS 4.0 or above Using GCD is it the best way to create singleton in Objective C thread safe id sharedInstance static dispatch_once_t..

Property vs instance variable in Objective-C [duplicate]

http://stackoverflow.com/questions/6146244/property-vs-instance-variable-in-objective-c

Where's the best SQLite 3 tutorial for iPhone-SDK? [closed]

http://stackoverflow.com/questions/716839/wheres-the-best-sqlite-3-tutorial-for-iphone-sdk

creating an database and so on. Where can I find it iphone sqlite share improve this question Using SQLite 3 on the iPhone is really not that different from using it on any other platform. You should..

Using HTML and Local Images Within UIWebView

http://stackoverflow.com/questions/747407/using-html-and-local-images-within-uiwebview

HTML and Local Images Within UIWebView I have a UIWebView in my app which I want to use to display.. show up in the web view. Any ideas iphone html uikit uiwebview share improve this question Using relative paths or file paths to refer to images does not work with UIWebView. Instead you have to load..

How to check for an active Internet Connection on iPhone SDK?

http://stackoverflow.com/questions/1083701/how-to-check-for-an-active-internet-connection-on-iphone-sdk

to check for an active Internet Connection on iPhone SDK I would like to check to see if I have an Internet connection on the iPhone using the Cocoa Touch libraries. I came up with a way to do this using an NSURL . The way I did it seems a bit unreliable because even Google could one day be down and.. on iPhone SDK I would like to check to see if I have an Internet connection on the iPhone using the Cocoa Touch libraries. I came up with a way to do this using an NSURL . The way I did it seems a bit unreliable because even Google could one day be down and relying on a 3rd party seems bad and while I could check to see.. thread dispatch_async dispatch_get_main_queue ^ NSLog @ Someone broke the internet internetReachableFoo startNotifier METHOD 2 Do it yourself the old way using Apple's outdated Reachability class 1 Add SystemConfiguration framework to the project but don't worry about including it anywhere 2 Add Apple's version of Reachability.h..

How to programmatically send SMS on the iPhone?

http://stackoverflow.com/questions/10848/how-to-programmatically-send-sms-on-the-iphone

a viewcontroller you can import into your application. You prepopulate the SMS fields then the user can initiate the SMS send within the controller. Unlike using the sms ... url format this allows your application to stay open and allows you to populate both the to and the body fields. You can even specify multiple recipients... without iOS 4 and it won't work on the iPod touch or the iPad except perhaps under iOS 5. You must either detect the device and iOS limitations prior to using this controller or risk restricting your app to recently upgraded 3G 3GS and 4 iPhones. However an intermediate server that sends SMS will allow any and all of..

How to make a UITextField move up when keyboard is present

http://stackoverflow.com/questions/1126726/how-to-make-a-uitextfield-move-up-when-keyboard-is-present

scroll and change textboxes for example. I've got it working where I change the frame size of the UIScrollView when the keyboard goes up and down. I'm simply using void textFieldDidBeginEditing UITextField textField Keyboard becomes visible scrollView.frame CGRectMake scrollView.frame.origin.x scrollView.frame.origin.y scrollView.frame.size.width..

iOS 6 apps - how to deal with iPhone 5 screen size? [duplicate]

http://stackoverflow.com/questions/12396545/ios-6-apps-how-to-deal-with-iphone-5-screen-size

They will be letterboxed or basically the extra 88 points in height would simply be black. If you only plan to support iOS 6 then definitely consider using Auto Layout. It removes all fixed layout handling and instead uses constraints to lay things out. Nothing will be hard coded and your life will become a lot simpler...

Symbolicating iPhone App Crash Reports

http://stackoverflow.com/questions/1460892/symbolicating-iphone-app-crash-reports

that was created at the time of release and the crash report receive from APPLE into a FOLDER. OPEN terminal application and go to the folder created above using CD command atos arch armv7 o YOURAPP.app YOURAPP MEMORY_LOCATION_OF_CRASH. The memory location should be the one at which the app crashed as per the report. Ex..

How do I detect when someone shakes an iPhone?

http://stackoverflow.com/questions/150446/how-do-i-detect-when-someone-shakes-an-iphone

a view that can get the shake event simply by subclassing the view with only these methods and then selecting this new type instead of the base type in IB or using it when allocating a view . In the view controller you want to set this view to become first responder void viewWillAppear BOOL animated shakeView becomeFirstResponder..

Programmatically get own phone number in iOS

http://stackoverflow.com/questions/193182/programmatically-get-own-phone-number-in-ios

that the highest ranking solution currently the first response violates the latest SDK Agreement as of Nov 5 2009. Our application was just rejected for using it. Here's the response from Apple For security reasons iPhone OS restricts an application including its preferences and data to a unique location in the file system...

How do I associate file types with an iPhone application?

http://stackoverflow.com/questions/2774343/how-do-i-associate-file-types-with-an-iphone-application

directory under a subdirectory corresponding to what email box they arrived in. You can get the URL for this file within the application delegate method using code like the following NSURL url NSURL launchOptions valueForKey UIApplicationLaunchOptionsURLKey Note that this is the same approach we used for handling custom..

Check iPhone iOS Version

http://stackoverflow.com/questions/3339722/check-iphone-ios-version

floatValue but does not work I just want a if version 3.1.3 How can I do this iphone version ios share improve this question You can get the OS version using UIDevice currentDevice systemVersion However you should avoid relying on the version string as an indication of device or OS capabilities. There is usually a more.. method of checking whether a particular feature or class is available. For example you can check if UIPopoverController is available on the current device using NSClassFromString if NSClassFromString @ UIPopoverController Do something Some classes like CLLocationManager and UIDevice provide methods to check device capabilities..

Prefixing property names with an underscore in Objective C [duplicate]

http://stackoverflow.com/questions/3521254/prefixing-property-names-with-an-underscore-in-objective-c

messages to themselves to access properties it's hard to confuse when you're accessing a property or when you're accessing its backing ivar directly though using the 2.0 dot access to properties does make it more possible. Using the standard message passing syntax makes intent more explicit IMO. @interface Foo NSObject NSNumber..

Can I embed a custom font in an iPhone application?

http://stackoverflow.com/questions/360751/can-i-embed-a-custom-font-in-an-iphone-application

only on OS X not on iPhone. Consequently I am setting a bounty for this question and I will award the bounty to the first person who provides an answer using only documented APIs who responds with sufficient information to get this working on the device. Working on the simulator too would be a bonus. EDIT it appears..

How do I create delegates in Objective-C?

http://stackoverflow.com/questions/626898/how-do-i-create-delegates-in-objective-c

init window setDelegate myDelegate On the NSWindow side it probably has code similar to this to see if the delegate responds to the windowDidMove message using respondsToSelector and send it if appropriate. if self delegate respondsToSelector @selector windowDidMove self delegate windowDidMove notification The delegate..

UIDevice uniqueIdentifier Deprecated - What To Do Now?

http://stackoverflow.com/questions/6993325/uidevice-uniqueidentifier-deprecated-what-to-do-now

property. To create a unique identifier specific to your app you can call the CFUUIDCreate function to create a UUID and write it to the defaults database using the NSUserDefaults class. However this value won't be the same if a user uninstalls and re installs the app. iphone ios ipad share improve this question A.. first time is what Apple seems to want you to use . Edit 3 So this major point doesn't get lost in the comment noise do not use the MAC as UUID create a hash using the MAC . That hash will always create the same result every time even across reinstalls and apps if the hashing is done in the same way . Anyways nowadays 2013..

Difference between objectForKey and valueForKey?

http://stackoverflow.com/questions/1062183/difference-between-objectforkey-and-valueforkey

numberWithInt 12345 Account newAccount Account alloc init newAccount setAccountNumber anAccountNUmber NSNumber anotherAccountNumber newAccount accountNumber Using KVC I can access the property dynamically NSNumber anAccountNumber NSNumber numberWithInt 12345 Account newAccount Account alloc init newAccount setValue anAccountNumber..

How to change the device orientation programmatically in iOS 6

http://stackoverflow.com/questions/12650137/how-to-change-the-device-orientation-programmatically-in-ios-6

UIInterfaceOrientationMaskPortrait UIInterfaceOrientationMaskLandscapeLeft UIInterfaceOrientationMaskLandscapeRight UIInterfaceOrientationMask Using shouldAutorotateToInterfaceOrientation method BOOL shouldAutorotateToInterfaceOrientation UIInterfaceOrientation toInterfaceOrientation return UIInterfaceOrientationIsLandscapeRight.. BOOL shouldAutorotateToInterfaceOrientation UIInterfaceOrientation toInterfaceOrientation return UIInterfaceOrientationIsLandscapeRight toInterfaceOrientation Using supportedInterfaceOrientations method NSUInteger supportedInterfaceOrientations return UIInterfaceOrientationMaskLandscapeRight These are the added methods to UIViewController..

Where to place the “Core Data Stack” in a Cocoa/Cocoa Touch application

http://stackoverflow.com/questions/1267520/where-to-place-the-core-data-stack-in-a-cocoa-cocoa-touch-application

a discrete set of actions. The appropriate unit of currency for a view controller is therefore usually a managed object context otherwise a managed object. Using and passing a singleton object that manages a stack and from which you retrieve a context typically at best introduces a needless level of indirection and at worst..

How do I change the Navigation Bar color in iOS 7?

http://stackoverflow.com/questions/18929864/how-do-i-change-the-navigation-bar-color-in-ios-7

Using SSL in an iPhone App - Export Compliance

http://stackoverflow.com/questions/2128927/using-ssl-in-an-iphone-app-export-compliance

SSL in an iPhone App Export Compliance I'm looking at creating an iPhone app that will communicate with a REST Web service. Because some user sensitive data name..

Objective-C - When to use 'self'

http://stackoverflow.com/questions/2385980/objective-c-when-to-use-self

I'm assuming that in both cases mainViewController is referring to the same instance variable. iphone objective c cocoa touch share improve this question Using self causes your class' setter for this variable to be called rather than changing the ivar directly. self.mainViewController aController is equivalent to self..

Using the apple FFT and accelerate Framework

http://stackoverflow.com/questions/3398753/using-the-apple-fft-and-accelerate-framework

the apple FFT and accelerate Framework Has anybody used the apple FFT for an iPhone app yet or know where I might find a sample application as to how to use it..

Prefixing property names with an underscore in Objective C [duplicate]

http://stackoverflow.com/questions/3521254/prefixing-property-names-with-an-underscore-in-objective-c

when you're accessing a property or when you're accessing its backing ivar directly though using the 2.0 dot access to properties does make it more possible. Using the standard message passing syntax makes intent more explicit IMO. @interface Foo NSObject NSNumber bar @property readwrite retain NSNumber bar @end @implementation..

parsing HTML on the iPhone [closed]

http://stackoverflow.com/questions/405749/parsing-html-on-the-iphone

this question I found using hpple quite useful to parse messy HTML. Hpple project is a Objective C wrapper on the XPathQuery library for parsing HTML. Using it you can send an XPath query and receive the result . Requirements Add libxml2 includes to your project Menu Project Edit Project Settings Search for setting..

Gradients on UIView and UILabels On iPhone [duplicate]

http://stackoverflow.com/questions/422066/gradients-on-uiview-and-uilabels-on-iphone

a gradient in iPhone apps My application needs to display text in either a View or Label but the back ground must be a gradient as opposed to a true color. Using a graphics program to create desired look is no good as the text may vary depending on data returned from a server. Does anyone know the quickest way to tackle..

iOS SDK - Programmatically generate a PDF file

http://stackoverflow.com/questions/4362734/ios-sdk-programmatically-generate-a-pdf-file

SDK Programmatically generate a PDF file Using the CoreGraphics framework is tedious work in my honest opinion when it comes to programmatically drawing a PDF file. I would like to programmatically create a..

iPhone - Backgrounding to poll for events

http://stackoverflow.com/questions/4656214/iphone-backgrounding-to-poll-for-events

the task if your application enters foreground again. And terminate the task if you don't need it anymore. For my own experience I measured something. Using the location callbacks with having the GPS radio on is sucking my battery down very quickly. Using the approach which I posted in Update 2 is taking nearly no energy... it anymore. For my own experience I measured something. Using the location callbacks with having the GPS radio on is sucking my battery down very quickly. Using the approach which I posted in Update 2 is taking nearly no energy. According to the userexperience this is a better approach. Maybe other Apps work like this hiding..

Return to app behavior after phone call different in native code than UIWebView

http://stackoverflow.com/questions/5317783/return-to-app-behavior-after-phone-call-different-in-native-code-than-uiwebview

share improve this question Behavior does differ between calling UIApplication openURL with a tel URL and clicking a link to the same URL in a UIWebView . Using a UIWebView instead of a UILabel might have some downsides but you don't have to actually display the UIWebView to get its tel URL handling behavior. Instead just..

What's the best way to communicate between view controllers?

http://stackoverflow.com/questions/569940/whats-the-best-way-to-communicate-between-view-controllers

That's the gist of my response. I'll include an example of using the dependency injection pattern with a controller below in case it's helpful. Example of Using Dependency Injection with a View Controller Let's say you're building a screen in which several books are listed. The user can pick books he she wants to buy and..

Create singleton using GCD's dispatch_once in Objective C

http://stackoverflow.com/questions/5720029/create-singleton-using-gcds-dispatch-once-in-objective-c

Property vs instance variable in Objective-C [duplicate]

http://stackoverflow.com/questions/6146244/property-vs-instance-variable-in-objective-c

Where's the best SQLite 3 tutorial for iPhone-SDK? [closed]

http://stackoverflow.com/questions/716839/wheres-the-best-sqlite-3-tutorial-for-iphone-sdk

I set up the whole thing including setting up the library creating an database and so on. Where can I find it iphone sqlite share improve this question Using SQLite 3 on the iPhone is really not that different from using it on any other platform. You should read the general SQLite documentation . In your iPhone app you..

Using HTML and Local Images Within UIWebView

http://stackoverflow.com/questions/747407/using-html-and-local-images-within-uiwebview

HTML and Local Images Within UIWebView I have a UIWebView in my app which I want to use to display an image which will link to another url. I'm using img src image.jpg.. the full path of the image and using that and it still doesn't show up in the web view. Any ideas iphone html uikit uiwebview share improve this question Using relative paths or file paths to refer to images does not work with UIWebView. Instead you have to load the HTML into the view with the correct baseURL NSString..

How to check for an active Internet Connection on iPhone SDK?

http://stackoverflow.com/questions/1083701/how-to-check-for-an-active-internet-connection-on-iphone-sdk

active Internet Connection on iPhone SDK I would like to check to see if I have an Internet connection on the iPhone using the Cocoa Touch libraries. I came up with a way to do this using an NSURL . The way I did it seems a bit unreliable because.. to see if I have an Internet connection on the iPhone using the Cocoa Touch libraries. I came up with a way to do this using an NSURL . The way I did it seems a bit unreliable because even Google could one day be down and relying on a 3rd party.. ^ NSLog @ Someone broke the internet internetReachableFoo startNotifier METHOD 2 Do it yourself the old way using Apple's outdated Reachability class 1 Add SystemConfiguration framework to the project but don't worry about including it..

How to programmatically send SMS on the iPhone?

http://stackoverflow.com/questions/10848/how-to-programmatically-send-sms-on-the-iphone

your application. You prepopulate the SMS fields then the user can initiate the SMS send within the controller. Unlike using the sms ... url format this allows your application to stay open and allows you to populate both the to and the body fields... the iPod touch or the iPad except perhaps under iOS 5. You must either detect the device and iOS limitations prior to using this controller or risk restricting your app to recently upgraded 3G 3GS and 4 iPhones. However an intermediate server that..

How to make a UITextField move up when keyboard is present

http://stackoverflow.com/questions/1126726/how-to-make-a-uitextfield-move-up-when-keyboard-is-present

I've got it working where I change the frame size of the UIScrollView when the keyboard goes up and down. I'm simply using void textFieldDidBeginEditing UITextField textField Keyboard becomes visible scrollView.frame CGRectMake scrollView.frame.origin.x..

iOS 6 apps - how to deal with iPhone 5 screen size? [duplicate]

http://stackoverflow.com/questions/12396545/ios-6-apps-how-to-deal-with-iphone-5-screen-size

the extra 88 points in height would simply be black. If you only plan to support iOS 6 then definitely consider using Auto Layout. It removes all fixed layout handling and instead uses constraints to lay things out. Nothing will be hard coded..

Symbolicating iPhone App Crash Reports

http://stackoverflow.com/questions/1460892/symbolicating-iphone-app-crash-reports

and the crash report receive from APPLE into a FOLDER. OPEN terminal application and go to the folder created above using CD command atos arch armv7 o YOURAPP.app YOURAPP MEMORY_LOCATION_OF_CRASH. The memory location should be the one at which..

How do I detect when someone shakes an iPhone?

http://stackoverflow.com/questions/150446/how-do-i-detect-when-someone-shakes-an-iphone

by subclassing the view with only these methods and then selecting this new type instead of the base type in IB or using it when allocating a view . In the view controller you want to set this view to become first responder void viewWillAppear..

Programmatically get own phone number in iOS

http://stackoverflow.com/questions/193182/programmatically-get-own-phone-number-in-ios

currently the first response violates the latest SDK Agreement as of Nov 5 2009. Our application was just rejected for using it. Here's the response from Apple For security reasons iPhone OS restricts an application including its preferences and..

How do I associate file types with an iPhone application?

http://stackoverflow.com/questions/2774343/how-do-i-associate-file-types-with-an-iphone-application

to what email box they arrived in. You can get the URL for this file within the application delegate method using code like the following NSURL url NSURL launchOptions valueForKey UIApplicationLaunchOptionsURLKey Note that this is the.. that this is the same approach we used for handling custom URL schemes. You can separate the file URLs from others by using code like the following if url isFileURL Handle file being passed in else Handle custom URL scheme share improve this..

Check iPhone iOS Version

http://stackoverflow.com/questions/3339722/check-iphone-ios-version

a if version 3.1.3 How can I do this iphone version ios share improve this question You can get the OS version using UIDevice currentDevice systemVersion However you should avoid relying on the version string as an indication of device or.. feature or class is available. For example you can check if UIPopoverController is available on the current device using NSClassFromString if NSClassFromString @ UIPopoverController Do something Some classes like CLLocationManager and UIDevice..

Prefixing property names with an underscore in Objective C [duplicate]

http://stackoverflow.com/questions/3521254/prefixing-property-names-with-an-underscore-in-objective-c

it's hard to confuse when you're accessing a property or when you're accessing its backing ivar directly though using the 2.0 dot access to properties does make it more possible. Using the standard message passing syntax makes intent more..

Can I embed a custom font in an iPhone application?

http://stackoverflow.com/questions/360751/can-i-embed-a-custom-font-in-an-iphone-application

I am setting a bounty for this question and I will award the bounty to the first person who provides an answer using only documented APIs who responds with sufficient information to get this working on the device. Working on the simulator..

How do I create delegates in Objective-C?

http://stackoverflow.com/questions/626898/how-do-i-create-delegates-in-objective-c

On the NSWindow side it probably has code similar to this to see if the delegate responds to the windowDidMove message using respondsToSelector and send it if appropriate. if self delegate respondsToSelector @selector windowDidMove self delegate..

UIDevice uniqueIdentifier Deprecated - What To Do Now?

http://stackoverflow.com/questions/6993325/uidevice-uniqueidentifier-deprecated-what-to-do-now

specific to your app you can call the CFUUIDCreate function to create a UUID and write it to the defaults database using the NSUserDefaults class. However this value won't be the same if a user uninstalls and re installs the app. iphone ios.. you to use . Edit 3 So this major point doesn't get lost in the comment noise do not use the MAC as UUID create a hash using the MAC . That hash will always create the same result every time even across reinstalls and apps if the hashing is done..

Difference between objectForKey and valueForKey?

http://stackoverflow.com/questions/1062183/difference-between-objectforkey-and-valueforkey

Account alloc init newAccount setAccountNumber anAccountNUmber NSNumber anotherAccountNumber newAccount accountNumber Using KVC I can access the property dynamically NSNumber anAccountNumber NSNumber numberWithInt 12345 Account newAccount Account..

How to change the device orientation programmatically in iOS 6

http://stackoverflow.com/questions/12650137/how-to-change-the-device-orientation-programmatically-in-ios-6

UIInterfaceOrientationMaskLandscapeLeft UIInterfaceOrientationMaskLandscapeRight UIInterfaceOrientationMask Using shouldAutorotateToInterfaceOrientation method BOOL shouldAutorotateToInterfaceOrientation UIInterfaceOrientation toInterfaceOrientation.. UIInterfaceOrientation toInterfaceOrientation return UIInterfaceOrientationIsLandscapeRight toInterfaceOrientation Using supportedInterfaceOrientations method NSUInteger supportedInterfaceOrientations return UIInterfaceOrientationMaskLandscapeRight..

Where to place the “Core Data Stack” in a Cocoa/Cocoa Touch application

http://stackoverflow.com/questions/1267520/where-to-place-the-core-data-stack-in-a-cocoa-cocoa-touch-application

unit of currency for a view controller is therefore usually a managed object context otherwise a managed object. Using and passing a singleton object that manages a stack and from which you retrieve a context typically at best introduces a..

How do I change the Navigation Bar color in iOS 7?

http://stackoverflow.com/questions/18929864/how-do-i-change-the-navigation-bar-color-in-ios-7

Using SSL in an iPhone App - Export Compliance

http://stackoverflow.com/questions/2128927/using-ssl-in-an-iphone-app-export-compliance

SSL in an iPhone App Export Compliance I'm looking at creating an iPhone app that will communicate with a REST Web service...

Objective-C - When to use 'self'

http://stackoverflow.com/questions/2385980/objective-c-when-to-use-self

is referring to the same instance variable. iphone objective c cocoa touch share improve this question Using self causes your class' setter for this variable to be called rather than changing the ivar directly. self.mainViewController..

Using the apple FFT and accelerate Framework

http://stackoverflow.com/questions/3398753/using-the-apple-fft-and-accelerate-framework

the apple FFT and accelerate Framework Has anybody used the apple FFT for an iPhone app yet or know where I might find..

Prefixing property names with an underscore in Objective C [duplicate]

http://stackoverflow.com/questions/3521254/prefixing-property-names-with-an-underscore-in-objective-c

you're accessing its backing ivar directly though using the 2.0 dot access to properties does make it more possible. Using the standard message passing syntax makes intent more explicit IMO. @interface Foo NSObject NSNumber bar @property readwrite..

parsing HTML on the iPhone [closed]

http://stackoverflow.com/questions/405749/parsing-html-on-the-iphone

quite useful to parse messy HTML. Hpple project is a Objective C wrapper on the XPathQuery library for parsing HTML. Using it you can send an XPath query and receive the result . Requirements Add libxml2 includes to your project Menu Project Edit..

Gradients on UIView and UILabels On iPhone [duplicate]

http://stackoverflow.com/questions/422066/gradients-on-uiview-and-uilabels-on-iphone

needs to display text in either a View or Label but the back ground must be a gradient as opposed to a true color. Using a graphics program to create desired look is no good as the text may vary depending on data returned from a server. Does..

iOS SDK - Programmatically generate a PDF file

http://stackoverflow.com/questions/4362734/ios-sdk-programmatically-generate-a-pdf-file

SDK Programmatically generate a PDF file Using the CoreGraphics framework is tedious work in my honest opinion when it comes to programmatically drawing a PDF file. I..

iPhone - Backgrounding to poll for events

http://stackoverflow.com/questions/4656214/iphone-backgrounding-to-poll-for-events

foreground again. And terminate the task if you don't need it anymore. For my own experience I measured something. Using the location callbacks with having the GPS radio on is sucking my battery down very quickly. Using the approach which I.. measured something. Using the location callbacks with having the GPS radio on is sucking my battery down very quickly. Using the approach which I posted in Update 2 is taking nearly no energy. According to the userexperience this is a better approach...

Return to app behavior after phone call different in native code than UIWebView

http://stackoverflow.com/questions/5317783/return-to-app-behavior-after-phone-call-different-in-native-code-than-uiwebview

does differ between calling UIApplication openURL with a tel URL and clicking a link to the same URL in a UIWebView . Using a UIWebView instead of a UILabel might have some downsides but you don't have to actually display the UIWebView to get its..

What's the best way to communicate between view controllers?

http://stackoverflow.com/questions/569940/whats-the-best-way-to-communicate-between-view-controllers

include an example of using the dependency injection pattern with a controller below in case it's helpful. Example of Using Dependency Injection with a View Controller Let's say you're building a screen in which several books are listed. The user..

Create singleton using GCD's dispatch_once in Objective C

http://stackoverflow.com/questions/5720029/create-singleton-using-gcds-dispatch-once-in-objective-c

Property vs instance variable in Objective-C [duplicate]

http://stackoverflow.com/questions/6146244/property-vs-instance-variable-in-objective-c

Where's the best SQLite 3 tutorial for iPhone-SDK? [closed]

http://stackoverflow.com/questions/716839/wheres-the-best-sqlite-3-tutorial-for-iphone-sdk

up the library creating an database and so on. Where can I find it iphone sqlite share improve this question Using SQLite 3 on the iPhone is really not that different from using it on any other platform. You should read the general SQLite..

Using HTML and Local Images Within UIWebView

http://stackoverflow.com/questions/747407/using-html-and-local-images-within-uiwebview

HTML and Local Images Within UIWebView I have a UIWebView in my app which I want to use to display an image which will.. and it still doesn't show up in the web view. Any ideas iphone html uikit uiwebview share improve this question Using relative paths or file paths to refer to images does not work with UIWebView. Instead you have to load the HTML into the..