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2014/10/15 ¤U¤È 10:04:34
iphone Programming Glossary: beingHow 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 up when keyboard comes up then it's not needed. For showing the textfields without being hidden by the keyboard the standard way is to move up down the view having textfields whenever the keyboard..
Lazy load images in UITableView http://stackoverflow.com/questions/1130089/lazy-load-images-in-uitableview from URLs. I want to do a lazy load of images so the UI does not freeze up while the images are being loaded. I tried getting the images in separate threads but I have to load each image every time a cell..
Add UIPickerView & a Button in Action sheet - How? http://stackoverflow.com/questions/1262574/add-uipickerview-a-button-in-action-sheet-how itemSelectedatRow in tableView didSelectRowAtIndexPath . This approach has the added benefit of being fairly reusable. To use import the SimpleTableViewController class in your ViewController.h conform..
AES Encryption for an NSString on the iPhone http://stackoverflow.com/questions/1400246/aes-encryption-for-an-nsstring-on-the-iphone trying with AES256 encryption. I want to write a method which takes two NSString instances one being the message to encrypt and the other being a 'passcode' to encrypt it with I suspect I'd have to generate.. write a method which takes two NSString instances one being the message to encrypt and the other being a 'passcode' to encrypt it with I suspect I'd have to generate the encryption key with the passcode..
How can I get a writable path on the iPhone? http://stackoverflow.com/questions/1567134/how-can-i-get-a-writable-path-on-the-iphone may flesh out question and answer s . If you find the answer useful please vote up the question being a community wiki I should not get points for this voting but it will help others find it How can I get..
How to force NSLocalizedString to use a specific language http://stackoverflow.com/questions/1669645/how-to-force-nslocalizedstring-to-use-a-specific-language settings for preferred languages are. This returns an array of language codes with the first one being the one set by the user for their phone and the subsequent ones used as fallbacks if a resource is not..
Is there a documented way to set the iPhone orientation? http://stackoverflow.com/questions/181780/is-there-a-documented-way-to-set-the-iphone-orientation issue on the later iPhone 3.1.2 SDK. It now appears to honor the requested orientation of the view being pushed back onto the stack. That likely means that you would need to detect older iPhone OS versions..
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
How do you use NSAttributedString? http://stackoverflow.com/questions/3482346/how-do-you-use-nsattributedstring building attributed strings I prefer to use the mutable subclass just to keep things cleaner. That being said here's how you create a tri color attributed string NSMutableAttributedString string NSMutableAttributedString..
Build fat static library (device + simulator) using Xcode and SDK 4+ http://stackoverflow.com/questions/3520977/build-fat-static-library-device-simulator-using-xcode-and-sdk-4 just one. # ...we need to build ALL targets # ...we MUST NOT re build the target that is ALREADY being built Xcode WILL CRASH YOUR COMPUTER if you try this infinite recursion # # # So build ONLY the missing..
Prefixing property names with an underscore in Objective C [duplicate] http://stackoverflow.com/questions/3521254/prefixing-property-names-with-an-underscore-in-objective-c the underscore because that is the one way it should be done is there a good reason for this style being the preferred one iphone objective c coding style share improve this question Current suggested..
Bold & Non-Bold Text In A Single UILabel? http://stackoverflow.com/questions/3586871/bold-non-bold-text-in-a-single-uilabel results with a bit more of code. Interested people please look down the old answer. Now I am just being lazy so p _label setText text There is a couple of good introductory blog posts here from guys at invasivecode..
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 this code UIFont font UIFont fontWithName @ Harrowprint size 20 which resulted in an exception being thrown. Looking at the TTF file in Finder confirmed that the font name was Harrowprint. EDIT there have..
How to capture UIView to UIImage without loss of quality on retina display http://stackoverflow.com/questions/4334233/how-to-capture-uiview-to-uiimage-without-loss-of-quality-on-retina-display 4 is applying a filter when you implicitly scale it up or just your brain is picking up on it being less sharp than everything around it. So I guess #import QuartzCore QuartzCore.h UIImage imageWithView..
iOS UIImagePickerController result image orientation after upload http://stackoverflow.com/questions/5427656/ios-uiimagepickercontroller-result-image-orientation-after-upload and other UIImage consumers to rotate the raw image data. There's a good chance that this flag is being saved to the exif data in the uploaded jpeg image but the program you use to view it is not honoring..
Locking the Fields in MFMailComposeViewController http://stackoverflow.com/questions/6284599/locking-the-fields-in-mfmailcomposeviewcontroller
How do I get a background location update every n minutes in my iOS application? http://stackoverflow.com/questions/6347503/how-do-i-get-a-background-location-update-every-n-minutes-in-my-ios-application be enabled and disabled again before there is no time remaining to avoid the background task being killed. This does work since location is one of the three allowed types of background execution . Note..
Understanding reference counting with Cocoa and Objective-C http://stackoverflow.com/questions/6578/understanding-reference-counting-with-cocoa-and-objective-c once you understand the basic concepts. In Cocoa each object keeps track of how many times it is being referenced specifically the NSObject base class implements this . By calling retain on an object you..
performSelector may cause a leak because its selector is unknown http://stackoverflow.com/questions/7017281/performselector-may-cause-a-leak-because-its-selector-is-unknown someMethod is returning a non object including void you could end up with a garbage pointer value being retained released and crash. Additional Arguments One consideration is that this is the same warning..
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 screen. If you are adding the scroll view just to make the textfield scroll up when keyboard comes up then it's not needed. For showing the textfields without being hidden by the keyboard the standard way is to move up down the view having textfields whenever the keyboard is shown. Here is some sample code #define kOFFSET_FOR_KEYBOARD..
Lazy load images in UITableView http://stackoverflow.com/questions/1130089/lazy-load-images-in-uitableview an image and a label in the cells where I get the images from URLs. I want to do a lazy load of images so the UI does not freeze up while the images are being loaded. I tried getting the images in separate threads but I have to load each image every time a cell becomes visible again Otherwise reuse of cells shows old..
Add UIPickerView & a Button in Action sheet - How? http://stackoverflow.com/questions/1262574/add-uipickerview-a-button-in-action-sheet-how the tableview data source and delegate methods calling itemSelectedatRow in tableView didSelectRowAtIndexPath . This approach has the added benefit of being fairly reusable. To use import the SimpleTableViewController class in your ViewController.h conform to the SimpleTableViewDelegate and implement the itemSelectedAtRow..
AES Encryption for an NSString on the iPhone http://stackoverflow.com/questions/1400246/aes-encryption-for-an-nsstring-on-the-iphone returning another string with the encrypted data I've been trying with AES256 encryption. I want to write a method which takes two NSString instances one being the message to encrypt and the other being a 'passcode' to encrypt it with I suspect I'd have to generate the encryption key with the passcode in a way that can.. data I've been trying with AES256 encryption. I want to write a method which takes two NSString instances one being the message to encrypt and the other being a 'passcode' to encrypt it with I suspect I'd have to generate the encryption key with the passcode in a way that can be reversed if the passcode is supplied with..
How can I get a writable path on the iPhone? http://stackoverflow.com/questions/1567134/how-can-i-get-a-writable-path-on-the-iphone Thus I have also made this a community wiki so that others may flesh out question and answer s . If you find the answer useful please vote up the question being a community wiki I should not get points for this voting but it will help others find it How can I get a path into which file writes are allowed on the iPhone You..
How to force NSLocalizedString to use a specific language http://stackoverflow.com/questions/1669645/how-to-force-nslocalizedstring-to-use-a-specific-language key in NSUserDefaults to determine what the user's settings for preferred languages are. This returns an array of language codes with the first one being the one set by the user for their phone and the subsequent ones used as fallbacks if a resource is not available in the preferred language. on the desktop the user..
Is there a documented way to set the iPhone orientation? http://stackoverflow.com/questions/181780/is-there-a-documented-way-to-set-the-iphone-orientation touch share improve this question This is no longer an issue on the later iPhone 3.1.2 SDK. It now appears to honor the requested orientation of the view being pushed back onto the stack. That likely means that you would need to detect older iPhone OS versions and only apply the setOrientation when it is prior to the latest..
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
How do you use NSAttributedString? http://stackoverflow.com/questions/3482346/how-do-you-use-nsattributedstring nsattributedstring share improve this question When building attributed strings I prefer to use the mutable subclass just to keep things cleaner. That being said here's how you create a tri color attributed string NSMutableAttributedString string NSMutableAttributedString alloc initWithString @ firstsecondthird string..
Build fat static library (device + simulator) using Xcode and SDK 4+ http://stackoverflow.com/questions/3520977/build-fat-static-library-device-simulator-using-xcode-and-sdk-4 ...but this is a LIBRARY so Apple is wrong to set it to build just one. # ...we need to build ALL targets # ...we MUST NOT re build the target that is ALREADY being built Xcode WILL CRASH YOUR COMPUTER if you try this infinite recursion # # # So build ONLY the missing platforms configurations. if true ALREADYINVOKED false then..
Prefixing property names with an underscore in Objective C [duplicate] http://stackoverflow.com/questions/3521254/prefixing-property-names-with-an-underscore-in-objective-c _myStringProperty Should I get over my aversion to the underscore because that is the one way it should be done is there a good reason for this style being the preferred one iphone objective c coding style share improve this question Current suggested Objective C 2.0 practice is to use the same name for the ivar..
Bold & Non-Bold Text In A Single UILabel? http://stackoverflow.com/questions/3586871/bold-non-bold-text-in-a-single-uilabel attributes. The second is to use CoreText and get similar results with a bit more of code. Interested people please look down the old answer. Now I am just being lazy so p _label setText text There is a couple of good introductory blog posts here from guys at invasivecode that explain with more examples uses of NSAttributedString..
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 it to my Resources directory and to the project. I then tried this code UIFont font UIFont fontWithName @ Harrowprint size 20 which resulted in an exception being thrown. Looking at the TTF file in Finder confirmed that the font name was Harrowprint. EDIT there have been a number of replies so far which tell me to read the..
How to capture UIView to UIImage without loss of quality on retina display http://stackoverflow.com/questions/4334233/how-to-capture-uiview-to-uiimage-without-loss-of-quality-on-retina-display an iPhone 4 as on the other iPhones. I'll bet either the iPhone 4 is applying a filter when you implicitly scale it up or just your brain is picking up on it being less sharp than everything around it. So I guess #import QuartzCore QuartzCore.h UIImage imageWithView UIView view UIGraphicsBeginImageContextWithOptions view.bounds.size..
iOS UIImagePickerController result image orientation after upload http://stackoverflow.com/questions/5427656/ios-uiimagepickercontroller-result-image-orientation-after-upload a property imageOrientation which instructs the UIImageView and other UIImage consumers to rotate the raw image data. There's a good chance that this flag is being saved to the exif data in the uploaded jpeg image but the program you use to view it is not honoring that flag. To rotate the UIImage to display properly when uploaded..
Locking the Fields in MFMailComposeViewController http://stackoverflow.com/questions/6284599/locking-the-fields-in-mfmailcomposeviewcontroller
How do I get a background location update every n minutes in my iOS application? http://stackoverflow.com/questions/6347503/how-do-i-get-a-background-location-update-every-n-minutes-in-my-ios-application works just fine in case n is larger the location manager should be enabled and disabled again before there is no time remaining to avoid the background task being killed. This does work since location is one of the three allowed types of background execution . Note Did loose some time by testing this in the simulator where..
Understanding reference counting with Cocoa and Objective-C http://stackoverflow.com/questions/6578/understanding-reference-counting-with-cocoa-and-objective-c retain and release autorelease is really just a special case once you understand the basic concepts. In Cocoa each object keeps track of how many times it is being referenced specifically the NSObject base class implements this . By calling retain on an object you are telling it that you want to up its reference count by one...
performSelector may cause a leak because its selector is unknown http://stackoverflow.com/questions/7017281/performselector-may-cause-a-leak-because-its-selector-is-unknown after all. That means that if the method you're calling someMethod is returning a non object including void you could end up with a garbage pointer value being retained released and crash. Additional Arguments One consideration is that this is the same warning will occur with performSelector withObject and you could run..
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 just to make the textfield scroll up when keyboard comes up then it's not needed. For showing the textfields without being hidden by the keyboard the standard way is to move up down the view having textfields whenever the keyboard is shown. Here..
Add UIPickerView & a Button in Action sheet - How? http://stackoverflow.com/questions/1262574/add-uipickerview-a-button-in-action-sheet-how methods calling itemSelectedatRow in tableView didSelectRowAtIndexPath . This approach has the added benefit of being fairly reusable. To use import the SimpleTableViewController class in your ViewController.h conform to the SimpleTableViewDelegate..
AES Encryption for an NSString on the iPhone http://stackoverflow.com/questions/1400246/aes-encryption-for-an-nsstring-on-the-iphone data I've been trying with AES256 encryption. I want to write a method which takes two NSString instances one being the message to encrypt and the other being a 'passcode' to encrypt it with I suspect I'd have to generate the encryption.. encryption. I want to write a method which takes two NSString instances one being the message to encrypt and the other being a 'passcode' to encrypt it with I suspect I'd have to generate the encryption key with the passcode in a way that can be..
How can I get a writable path on the iPhone? http://stackoverflow.com/questions/1567134/how-can-i-get-a-writable-path-on-the-iphone wiki so that others may flesh out question and answer s . If you find the answer useful please vote up the question being a community wiki I should not get points for this voting but it will help others find it How can I get a path into which..
How to force NSLocalizedString to use a specific language http://stackoverflow.com/questions/1669645/how-to-force-nslocalizedstring-to-use-a-specific-language what the user's settings for preferred languages are. This returns an array of language codes with the first one being the one set by the user for their phone and the subsequent ones used as fallbacks if a resource is not available in the..
Is there a documented way to set the iPhone orientation? http://stackoverflow.com/questions/181780/is-there-a-documented-way-to-set-the-iphone-orientation is no longer an issue on the later iPhone 3.1.2 SDK. It now appears to honor the requested orientation of the view being pushed back onto the stack. That likely means that you would need to detect older iPhone OS versions and only apply the..
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
How do you use NSAttributedString? http://stackoverflow.com/questions/3482346/how-do-you-use-nsattributedstring question When building attributed strings I prefer to use the mutable subclass just to keep things cleaner. That being said here's how you create a tri color attributed string NSMutableAttributedString string NSMutableAttributedString alloc..
Build fat static library (device + simulator) using Xcode and SDK 4+ http://stackoverflow.com/questions/3520977/build-fat-static-library-device-simulator-using-xcode-and-sdk-4 to set it to build just one. # ...we need to build ALL targets # ...we MUST NOT re build the target that is ALREADY being built Xcode WILL CRASH YOUR COMPUTER if you try this infinite recursion # # # So build ONLY the missing platforms configurations...
Prefixing property names with an underscore in Objective C [duplicate] http://stackoverflow.com/questions/3521254/prefixing-property-names-with-an-underscore-in-objective-c over my aversion to the underscore because that is the one way it should be done is there a good reason for this style being the preferred one iphone objective c coding style share improve this question Current suggested Objective C 2.0 practice..
Bold & Non-Bold Text In A Single UILabel? http://stackoverflow.com/questions/3586871/bold-non-bold-text-in-a-single-uilabel and get similar results with a bit more of code. Interested people please look down the old answer. Now I am just being lazy so p _label setText text There is a couple of good introductory blog posts here from guys at invasivecode that explain..
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 project. I then tried this code UIFont font UIFont fontWithName @ Harrowprint size 20 which resulted in an exception being thrown. Looking at the TTF file in Finder confirmed that the font name was Harrowprint. EDIT there have been a number of..
How to capture UIView to UIImage without loss of quality on retina display http://stackoverflow.com/questions/4334233/how-to-capture-uiview-to-uiimage-without-loss-of-quality-on-retina-display bet either the iPhone 4 is applying a filter when you implicitly scale it up or just your brain is picking up on it being less sharp than everything around it. So I guess #import QuartzCore QuartzCore.h UIImage imageWithView UIView view UIGraphicsBeginImageContextWithOptions..
iOS UIImagePickerController result image orientation after upload http://stackoverflow.com/questions/5427656/ios-uiimagepickercontroller-result-image-orientation-after-upload the UIImageView and other UIImage consumers to rotate the raw image data. There's a good chance that this flag is being saved to the exif data in the uploaded jpeg image but the program you use to view it is not honoring that flag. To rotate..
Locking the Fields in MFMailComposeViewController http://stackoverflow.com/questions/6284599/locking-the-fields-in-mfmailcomposeviewcontroller
How do I get a background location update every n minutes in my iOS application? http://stackoverflow.com/questions/6347503/how-do-i-get-a-background-location-update-every-n-minutes-in-my-ios-application location manager should be enabled and disabled again before there is no time remaining to avoid the background task being killed. This does work since location is one of the three allowed types of background execution . Note Did loose some time..
Understanding reference counting with Cocoa and Objective-C http://stackoverflow.com/questions/6578/understanding-reference-counting-with-cocoa-and-objective-c just a special case once you understand the basic concepts. In Cocoa each object keeps track of how many times it is being referenced specifically the NSObject base class implements this . By calling retain on an object you are telling it that..
performSelector may cause a leak because its selector is unknown http://stackoverflow.com/questions/7017281/performselector-may-cause-a-leak-because-its-selector-is-unknown you're calling someMethod is returning a non object including void you could end up with a garbage pointer value being retained released and crash. Additional Arguments One consideration is that this is the same warning will occur with performSelector..
iphone sdk - Remove all characters except for numbers 0-9 from a string http://stackoverflow.com/questions/1160403/iphone-sdk-remove-all-characters-except-for-numbers-0-9-from-a-string lines of replaceOccurrencesOfCharactersInSet NSCharacterSet set and I admit that'd probably be really nice to have. Being me I'd probably just use a regex. If you use RegexKitLite then you can easily do #import RegexKitLite.h NSString number..
Reading audio buffer data with AudioQueue http://stackoverflow.com/questions/1248060/reading-audio-buffer-data-with-audioqueue i NSLog @ i buffer i Now I know my source file peaks all over the place but the values I see only max at 128 and 128. Being as this is a 16 bit file I would expect that the values would instead be 32768 to 32768. In addition there seems to be two..
How easy is it to develop an iPhone application using MonoTouch in Visual Studio? http://stackoverflow.com/questions/3695149/how-easy-is-it-to-develop-an-iphone-application-using-monotouch-in-visual-studio UI libraries or external libraries not available in MonoTouch Use MonoDevelop to build the UI code part of the app. Being able to quickly run the app to test helps a lot. Every once in a while if you feel you need to to a big cleanup open the..
Simple embeddable MidiSynth for iOS? http://stackoverflow.com/questions/4240391/simple-embeddable-midisynth-for-ios is out of dated. @lukebuehler's answer is much appropriate. If you don't mind non opensource solution try FMOD . Being a commercial audio engine for games fmod equips a simple MIDI synth. I've tried the free evaluation version. It plays GM..
http://stackoverflow.com/questions/4558639/sort-an-nsmutabledictionary valid for you you can call your own comparator function values sortedArrayUsingFunction comparatorFunction context nil Being comparatorFunction from AppleDocumentation NSInteger intSort id num1 id num2 void context int v1 num1 intValue int v2 num2..
Cell Not Being Added To TableViewController http://stackoverflow.com/questions/5482782/cell-not-being-added-to-tableviewcontroller Not Being Added To TableViewController My app is crashing freezing when I click the add button on my uialertview and it is supposed..
Jquery ajax post not working on iPhone and Android http://stackoverflow.com/questions/5577298/jquery-ajax-post-not-working-on-iphone-and-android ' ' this.Text ' option ' I've turned on JavaScript Console on the iPhone but it doesn't show any errors. Being new to developing for mobile devices I'm not sure how I should debug this. On the desktop I would just use Fiddler to see..
What's the best way to communicate between view controllers? http://stackoverflow.com/questions/569940/whats-the-best-way-to-communicate-between-view-controllers the best way to communicate between view controllers Being new to objective c cocoa and iPhone dev in general I have a strong desire to get the most out of the language and the frameworks...
Using iPhone as control device (game controller type) in Windows http://stackoverflow.com/questions/6076734/using-iphone-as-control-device-game-controller-type-in-windows Is there a way to use the iPhone as an interface device for a computer without actually having to code a driver Being the owner of a sub par game controller and realizing that it would be cheap and a good experience to try to roll my own..
AESCrypt decryption between iOS and PHP http://stackoverflow.com/questions/6461419/aescrypt-decryption-between-ios-and-php iPhone development experience. Short answer what tc. said. Something is horribly wrong with the AES256EncryptWithKey Being AES256 you would expect it to require a 32 byte key not a 16 byte key. But OK say it pads shorter keys with null bytes to..
UIViewController -viewDidLoad not being called http://stackoverflow.com/questions/913627/uiviewcontroller-viewdidload-not-being-called viewDidLoad not being called Being new to Cocoa I'm having a few issues with Interface Builder UIViewController and friends. I have a UIViewController subclass..
UINavigationController and autorotation http://stackoverflow.com/questions/970482/uinavigationcontroller-and-autorotation I attached GDB to the Photos application MobileSlideshow.app and discovered that it too uses UIDevice setOrientation . Being an internal application though I guess they have different rules. Is there a correct way to achieve the expected autorotation..
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