2014/10/15 下午 10:15:35
iphone Programming Glossary: usageParsing XML in iPhone [closed] http://stackoverflow.com/questions/1021102/parsing-xml-in-iphone Please have a look at Touch XML a Objective C framework for reading and writing XML. It's usage is similar drop in replacement for Apple's NSXMLDocument which is not available for the iPhone SDK ...
Use CoreData or SQLite on iPhone? [closed] http://stackoverflow.com/questions/1318467/use-coredata-or-sqlite-on-iphone SQLite using Core Data. On the iPhone it does a great job of batching fetches to minimize memory usage. The one downside as pointed out is that this limits you by requiring iPhone OS 3.0 for your end users...
http://stackoverflow.com/questions/1861656/iphone-reachability-checking
The simplest way to resize an UIImage? http://stackoverflow.com/questions/2658738/the-simplest-way-to-resize-an-uiimage UIGraphicsGetImageFromCurrentImageContext UIGraphicsEndImageContext return newImage Example usage #import MYUtil.h UIImage myIcon MYUtil imageWithImage myUIImageInstance scaledToSize CGSizeMake 20 20..
Does UIGestureRecognizer work on a UIWebView? http://stackoverflow.com/questions/2909807/does-uigesturerecognizer-work-on-a-uiwebview in the PhoneGap code that they set up a queue and timer to send the messages. Depending on your usage you may need to do the same thing. There are other questions on SO on this topic. Here is the Event..
iPhone Landscape FAQ and Solutions http://stackoverflow.com/questions/2953351/iphone-landscape-faq-and-solutions have some subviews that should be able to autorotate what the master controller will prevent . The usage of undocumented API's to force a certain interface orientation is not an option either. The solution..
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 need OBJROOT to be set too thanks to Doug Dickinson SCRIPT this is what you have to copy paste For usage install instructions see below ########################################## # # c.f. http stackoverflow.com.. Phase ... New Run Script Build Phase Copy paste the script above into the box ...BONUS OPTIONAL usage OPTIONAL if you have headers in your library add them to the Copy Headers phase OPTIONAL ...and drag..
http://stackoverflow.com/questions/3760924/set-line-height-in-uitextview return super styleString stringByAppendingString @ line height 1.2em @end This is not private API usage it is just subclassing. It's possible Apple may disagree of course though considering how we all used.. used to swizzle everything in order to customize UIKit appearance I feel that this kind of 𦑩rivate usage is not what Apple object to but it's such an easy way to achieve the goals of this question that you..
Fast and Lean PDF Viewer for iPhone / iPad / iOs - tips and hints? http://stackoverflow.com/questions/3889634/fast-and-lean-pdf-viewer-for-iphone-ipad-ios-tips-and-hints off screen . Generally PDF viewers are pretty heavy on memory too. Even monitor the memory usage of apple's zoomable PDF example. In my current project I'm developing a PDF viewer and am rendering.. ctx kCGRenderingIntentDefault before CGContextDrawPDFPage to reduce memory usage while drawing init'ing your NSOperations with a docRef is a bad idea memory wrap the docRef into a singleton...
iPhone - Backgrounding to poll for events http://stackoverflow.com/questions/4656214/iphone-backgrounding-to-poll-for-events this application which does exactly that. http itunes.apple.com us app dataman real time data usage id393282873 mt 8 It runs in the background and keeps track of the count of Cellular WiFi data you've..
Subclass UIButton to add a property http://stackoverflow.com/questions/5500327/subclass-uibutton-to-add-a-property NSObject property return NSObject objc_getAssociatedObject self UIB_PROPERTY_KEY @end Example usage #import UIButton Property.h ... UIButton button1 UIButton buttonWithType UIButtonTypeRoundedRect button1.property..
Tab bar controller inside a navigation controller, or sharing a navigation root view http://stackoverflow.com/questions/576764/tab-bar-controller-inside-a-navigation-controller-or-sharing-a-navigation-root of tab bar controller. I would like to avoid private APIs and the like but I'm not sure why this usage is explicitly prohibited even when it seems to work fine. Anyone know the reason I've thought about..
Programmatically retrieve memory usage on iPhone http://stackoverflow.com/questions/787160/programmatically-retrieve-memory-usage-on-iphone retrieve memory usage on iPhone I'm trying to retrieve the amount of memory my iPhone app is using at anytime programmatically... with the various profiling tools as well as they are designed to give you a much better picture of usage over all. #import mach mach.h ... void report_memory void struct task_basic_info info mach_msg_type_number_t..
iPhone Data Usage Tracking/Monitoring http://stackoverflow.com/questions/7946699/iphone-data-usage-tracking-monitoring dataSent NSNumber numberWithInt dataReceived nil This code collects information of internet usage of an iPhone device and not my application alone . Now if I use internet through WiFi or through 3G.. the the data bytes only in ifi_obytes sent and ifi_ibytes received but I think I should get WiFi usage in ifi_opackets and ifi_ipackets . Also wanted to add that if I'm connected to a WiFi network but am..
Parsing XML in iPhone [closed] http://stackoverflow.com/questions/1021102/parsing-xml-in-iphone
Use CoreData or SQLite on iPhone? [closed] http://stackoverflow.com/questions/1318467/use-coredata-or-sqlite-on-iphone has in most cases you can beat the performance of hand tuned SQLite using Core Data. On the iPhone it does a great job of batching fetches to minimize memory usage. The one downside as pointed out is that this limits you by requiring iPhone OS 3.0 for your end users. However this has not been a problem at all for my users..
http://stackoverflow.com/questions/1861656/iphone-reachability-checking
The simplest way to resize an UIImage? http://stackoverflow.com/questions/2658738/the-simplest-way-to-resize-an-uiimage
Does UIGestureRecognizer work on a UIWebView? http://stackoverflow.com/questions/2909807/does-uigesturerecognizer-work-on-a-uiwebview hasPrefix @ myscheme .. parse arguments return NO You can see in the PhoneGap code that they set up a queue and timer to send the messages. Depending on your usage you may need to do the same thing. There are other questions on SO on this topic. Here is the Event Handling documentation. In my case I added event listeners to..
iPhone Landscape FAQ and Solutions http://stackoverflow.com/questions/2953351/iphone-landscape-faq-and-solutions added to those said subviews. There's also a problem if you have some subviews that should be able to autorotate what the master controller will prevent . The usage of undocumented API's to force a certain interface orientation is not an option either. The solution The best solution I have found so far is a modification of..
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 of Frederik Wallner Added explicit setting of SYMROOT maybe need OBJROOT to be set too thanks to Doug Dickinson SCRIPT this is what you have to copy paste For usage install instructions see below ########################################## # # c.f. http stackoverflow.com questions 3520977 build fat static library device simulator.. NO for all items In Build Phases tab select Add ... New Build Phase ... New Run Script Build Phase Copy paste the script above into the box ...BONUS OPTIONAL usage OPTIONAL if you have headers in your library add them to the Copy Headers phase OPTIONAL ...and drag drop them from the Project section to the Public section OPTIONAL..
http://stackoverflow.com/questions/3760924/set-line-height-in-uitextview UITextView @end @implementation MBTextView id styleString return super styleString stringByAppendingString @ line height 1.2em @end This is not private API usage it is just subclassing. It's possible Apple may disagree of course though considering how we all used to swizzle everything in order to customize UIKit appearance.. Apple may disagree of course though considering how we all used to swizzle everything in order to customize UIKit appearance I feel that this kind of 𦑩rivate usage is not what Apple object to but it's such an easy way to achieve the goals of this question that you may as well try it. Should the app be rejected you can spend..
Fast and Lean PDF Viewer for iPhone / iPad / iOs - tips and hints? http://stackoverflow.com/questions/3889634/fast-and-lean-pdf-viewer-for-iphone-ipad-ios-tips-and-hints a tileSize tweak CALayers cant be prepared ahead of time rendered off screen . Generally PDF viewers are pretty heavy on memory too. Even monitor the memory usage of apple's zoomable PDF example. In my current project I'm developing a PDF viewer and am rendering a UIImage of a page in a separate thread issues here too and.. ctx kCGInterpolationHigh CGContextSetRenderingIntent ctx kCGRenderingIntentDefault before CGContextDrawPDFPage to reduce memory usage while drawing init'ing your NSOperations with a docRef is a bad idea memory wrap the docRef into a singleton. Cancel needless NSOperations When you can especially..
iPhone - Backgrounding to poll for events http://stackoverflow.com/questions/4656214/iphone-backgrounding-to-poll-for-events without abusing the background APIs. Last week I found this application which does exactly that. http itunes.apple.com us app dataman real time data usage id393282873 mt 8 It runs in the background and keeps track of the count of Cellular WiFi data you've used. I suspect that the developer is registering his app as..
Subclass UIButton to add a property http://stackoverflow.com/questions/5500327/subclass-uibutton-to-add-a-property self UIB_PROPERTY_KEY property OBJC_ASSOCIATION_RETAIN_NONATOMIC NSObject property return NSObject objc_getAssociatedObject self UIB_PROPERTY_KEY @end Example usage #import UIButton Property.h ... UIButton button1 UIButton buttonWithType UIButtonTypeRoundedRect button1.property @ HELLO NSLog @ Property @ button1.property button1.property..
Tab bar controller inside a navigation controller, or sharing a navigation root view http://stackoverflow.com/questions/576764/tab-bar-controller-inside-a-navigation-controller-or-sharing-a-navigation-root that is pushed onto the stack. It cannot be an instance of tab bar controller. I would like to avoid private APIs and the like but I'm not sure why this usage is explicitly prohibited even when it seems to work fine. Anyone know the reason I've thought about putting the tab bar controller as the main controller with each..
Programmatically retrieve memory usage on iPhone http://stackoverflow.com/questions/787160/programmatically-retrieve-memory-usage-on-iphone retrieve memory usage on iPhone I'm trying to retrieve the amount of memory my iPhone app is using at anytime programmatically. Yes I'm aware about ObjectAlloc Leaks. I'm not interested.. example below. However you really should become familiar with the various profiling tools as well as they are designed to give you a much better picture of usage over all. #import mach mach.h ... void report_memory void struct task_basic_info info mach_msg_type_number_t size sizeof info kern_return_t kerr task_info mach_task_self..
iPhone Data Usage Tracking/Monitoring http://stackoverflow.com/questions/7946699/iphone-data-usage-tracking-monitoring addrs return NSArray arrayWithObjects NSNumber numberWithInt dataSent NSNumber numberWithInt dataReceived nil This code collects information of internet usage of an iPhone device and not my application alone . Now if I use internet through WiFi or through 3G I get the the data bytes only in ifi_obytes sent and ifi_ibytes.. . Now if I use internet through WiFi or through 3G I get the the data bytes only in ifi_obytes sent and ifi_ibytes received but I think I should get WiFi usage in ifi_opackets and ifi_ipackets . Also wanted to add that if I'm connected to a WiFi network but am not using internet I still get value added to ifi_obytes and..
Parsing XML in iPhone [closed] http://stackoverflow.com/questions/1021102/parsing-xml-in-iphone improve this question Please have a look at Touch XML a Objective C framework for reading and writing XML. It's usage is similar drop in replacement for Apple's NSXMLDocument which is not available for the iPhone SDK . share improve this..
Use CoreData or SQLite on iPhone? [closed] http://stackoverflow.com/questions/1318467/use-coredata-or-sqlite-on-iphone of hand tuned SQLite using Core Data. On the iPhone it does a great job of batching fetches to minimize memory usage. The one downside as pointed out is that this limits you by requiring iPhone OS 3.0 for your end users. However this has..
http://stackoverflow.com/questions/1861656/iphone-reachability-checking
The simplest way to resize an UIImage? http://stackoverflow.com/questions/2658738/the-simplest-way-to-resize-an-uiimage UIImage newImage UIGraphicsGetImageFromCurrentImageContext UIGraphicsEndImageContext return newImage Example usage #import MYUtil.h UIImage myIcon MYUtil imageWithImage myUIImageInstance scaledToSize CGSizeMake 20 20 share improve this..
Does UIGestureRecognizer work on a UIWebView? http://stackoverflow.com/questions/2909807/does-uigesturerecognizer-work-on-a-uiwebview return NO You can see in the PhoneGap code that they set up a queue and timer to send the messages. Depending on your usage you may need to do the same thing. There are other questions on SO on this topic. Here is the Event Handling documentation...
iPhone Landscape FAQ and Solutions http://stackoverflow.com/questions/2953351/iphone-landscape-faq-and-solutions a problem if you have some subviews that should be able to autorotate what the master controller will prevent . The usage of undocumented API's to force a certain interface orientation is not an option either. The solution The best solution I..
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 of SYMROOT maybe need OBJROOT to be set too thanks to Doug Dickinson SCRIPT this is what you have to copy paste For usage install instructions see below ########################################## # # c.f. http stackoverflow.com questions 3520977.. Add ... New Build Phase ... New Run Script Build Phase Copy paste the script above into the box ...BONUS OPTIONAL usage OPTIONAL if you have headers in your library add them to the Copy Headers phase OPTIONAL ...and drag drop them from the..
http://stackoverflow.com/questions/3760924/set-line-height-in-uitextview id styleString return super styleString stringByAppendingString @ line height 1.2em @end This is not private API usage it is just subclassing. It's possible Apple may disagree of course though considering how we all used to swizzle everything.. how we all used to swizzle everything in order to customize UIKit appearance I feel that this kind of 𦑩rivate usage is not what Apple object to but it's such an easy way to achieve the goals of this question that you may as well try it...
Fast and Lean PDF Viewer for iPhone / iPad / iOs - tips and hints? http://stackoverflow.com/questions/3889634/fast-and-lean-pdf-viewer-for-iphone-ipad-ios-tips-and-hints ahead of time rendered off screen . Generally PDF viewers are pretty heavy on memory too. Even monitor the memory usage of apple's zoomable PDF example. In my current project I'm developing a PDF viewer and am rendering a UIImage of a page.. CGContextSetRenderingIntent ctx kCGRenderingIntentDefault before CGContextDrawPDFPage to reduce memory usage while drawing init'ing your NSOperations with a docRef is a bad idea memory wrap the docRef into a singleton. Cancel needless..
iPhone - Backgrounding to poll for events http://stackoverflow.com/questions/4656214/iphone-backgrounding-to-poll-for-events APIs. Last week I found this application which does exactly that. http itunes.apple.com us app dataman real time data usage id393282873 mt 8 It runs in the background and keeps track of the count of Cellular WiFi data you've used. I suspect that..
How to create custom easing function with Core Animation? http://stackoverflow.com/questions/5161465/how-to-create-custom-easing-function-with-core-animation kCAAnimationLinear set keyframes and we're done animation setValues values return animation @end Now usage will look something like this define a parametric function KeyframeParametricBlock function ^double double time return 1.0..
Subclass UIButton to add a property http://stackoverflow.com/questions/5500327/subclass-uibutton-to-add-a-property NSObject property return NSObject objc_getAssociatedObject self UIB_PROPERTY_KEY @end Example usage #import UIButton Property.h ... UIButton button1 UIButton buttonWithType UIButtonTypeRoundedRect button1.property @ HELLO..
Tab bar controller inside a navigation controller, or sharing a navigation root view http://stackoverflow.com/questions/576764/tab-bar-controller-inside-a-navigation-controller-or-sharing-a-navigation-root cannot be an instance of tab bar controller. I would like to avoid private APIs and the like but I'm not sure why this usage is explicitly prohibited even when it seems to work fine. Anyone know the reason I've thought about putting the tab bar..
Programmatically retrieve memory usage on iPhone http://stackoverflow.com/questions/787160/programmatically-retrieve-memory-usage-on-iphone retrieve memory usage on iPhone I'm trying to retrieve the amount of memory my iPhone app is using at anytime programmatically. Yes I'm aware.. become familiar with the various profiling tools as well as they are designed to give you a much better picture of usage over all. #import mach mach.h ... void report_memory void struct task_basic_info info mach_msg_type_number_t size sizeof..
iPhone Data Usage Tracking/Monitoring http://stackoverflow.com/questions/7946699/iphone-data-usage-tracking-monitoring NSNumber numberWithInt dataSent NSNumber numberWithInt dataReceived nil This code collects information of internet usage of an iPhone device and not my application alone . Now if I use internet through WiFi or through 3G I get the the data bytes.. or through 3G I get the the data bytes only in ifi_obytes sent and ifi_ibytes received but I think I should get WiFi usage in ifi_opackets and ifi_ipackets . Also wanted to add that if I'm connected to a WiFi network but am not using internet..
How can I upload a photo to a server with the iPhone? http://stackoverflow.com/questions/125306/how-can-i-upload-a-photo-to-a-server-with-the-iphone autorelease NSLog @ s data s n __func__ reply UTF8String if reply hasPrefix @ YES uploadDidSucceed YES @end Usage EPUploader alloc initWithURL NSURL URLWithString @ http yourserver.com uploadDB.php filePath @ path to some file delegate..
Best way to serialize a NSData into an hexadeximal string http://stackoverflow.com/questions/1305225/best-way-to-serialize-a-nsdata-into-an-hexadeximal-string NSString stringWithFormat @ 02lx unsigned long dataBuffer i return NSString stringWithString hexString @end Usage NSData someData ... NSString someDataHexadecimalString someData hexadecimalString This is probably better than calling someData..
adjust corners and crop the image openCV http://stackoverflow.com/questions/13098073/adjust-corners-and-crop-the-image-opencv
http://stackoverflow.com/questions/13248680/ocr-using-opencv for convert in Gray void blackAndWhite cv Mat dst cv Mat src self cvMatFromUIImage iv.image if src.data std cout Usage . Histogram_Demo path_to_image std endl Convert to grayscale cvtColor src src CV_BGR2GRAY Apply Histogram Equalization equalizeHist..
Delay the return value instead of whole method http://stackoverflow.com/questions/15128372/delay-the-return-value-instead-of-whole-method
How to get user details using twitter api v1.1 (Twitter error 215) http://stackoverflow.com/questions/17081012/how-to-get-user-details-using-twitter-api-v1-1-twitter-error-215 FHSTwitterEngine to your project and #import FHSTwitterEngine.h . 3.add SystemConfiguration.framework to your project. Usage 1.in the ViewDidLoad add the following code. UIButton logIn UIButton buttonWithType UIButtonTypeRoundedRect logIn.frame..
UITextField: move view when keyboard appears http://stackoverflow.com/questions/1775860/uitextfield-move-view-when-keyboard-appears with a single UIWindow . If you use multiple UIWindows you may need to modify retrieveFrameFromNotification method. Usage Include KBKeyboardHandler.h KBKeyboardHandler.m and KBKeyboardHandlerDelegate.h in your project. Implement the KBKeyboardHandlerDelegate..
Network Activity Monitoring on iPhone http://stackoverflow.com/questions/19977759/network-activity-monitoring-on-iphone useful links how to get tcp udp opening port list on iPhone I couldn't parse the data returned in this question Data Usage on iPhone sysctlbyname buf return type I'm not a networking guy..could not understand this one may be you guys can help..
What's the Point of (NSError**)error? http://stackoverflow.com/questions/2067563/whats-the-point-of-nserrorerror inside the implementation of save what's the point of passing a pointer to a pointer here What's the advantage sense Usage example NSError error if managedObjectContext save error Handle the error. iphone objective c pointers share improve..
iPhone - How do I detect the iPhone version? http://stackoverflow.com/questions/3177634/iphone-how-do-i-detect-the-iphone-version version. thanks for any help. iphone ipad share improve this question feel free to use this class I found it here Usage UIDeviceHardware h UIDeviceHardware alloc init self setDeviceModel h platformString h release UIDeviceHardware.h UIDeviceHardware.h..
Usage of NSException in iPhone Apps http://stackoverflow.com/questions/4310560/usage-of-nsexception-in-iphone-apps of NSException in iPhone Apps One of my friends asked me not to use NSException in iPhone Apps. The reason he gave was..
iPhone Data Usage Monitoring [duplicate] http://stackoverflow.com/questions/4380806/iphone-data-usage-monitoring Data Usage Monitoring duplicate Possible Duplicate iPhone Data Usage Tracking Monitoring I'm trying to build a Data Usage Monitoring.. Data Usage Monitoring duplicate Possible Duplicate iPhone Data Usage Tracking Monitoring I'm trying to build a Data Usage Monitoring iphone app as a quick demo but haven't been able to figure.. Data Usage Monitoring duplicate Possible Duplicate iPhone Data Usage Tracking Monitoring I'm trying to build a Data Usage Monitoring iphone app as a quick demo but haven't been able to figure out how to get CellularData Wifi usage statistics..
iPhone/iPad data usage tracking http://stackoverflow.com/questions/5274805/iphone-ipad-data-usage-tracking to ask the community a quick question. Out of curiosity would anyone have an idea how the iPhone App DataMan and Data Usage are pulling data readings of your personal cellular data usage I've check the web high and low for possible answers and..
What happens to SDWebImage Cached Images in my app when the image file on the server changes? http://stackoverflow.com/questions/6053416/what-happens-to-sdwebimage-cached-images-in-my-app-when-the-image-file-on-the-se the SDWebImage library to cache web images in my app https github.com rs SDWebImage blob master README.md Current Usage imageView setImageWithURL NSURL URLWithString profilePictureUrl placeholderImage UIImage imageNamed @ placeholder.png My..
How to write text on image in objective-c iPhone? http://stackoverflow.com/questions/6992830/how-to-write-text-on-image-in-objective-c-iphone withFont font UIImage newImage UIGraphicsGetImageFromCurrentImageContext UIGraphicsEndImageContext return newImage Usage note replace ImageUtils with the class where you pasted the method above UIImage img ImageUtils drawText @ Some text inImage..
Indent the text in a UITextField http://stackoverflow.com/questions/7565645/indent-the-text-in-a-uitextfield verticalPadding 2 CGRect editingRectForBounds CGRect bounds return self textRectForBounds bounds @end Usage UIImage bg UIImage imageNamed @ textfield.png CGRect rect CGRectMake 0 0 bg.size.width bg.size.height MyUITextField textfield..
iPhone Data Usage Tracking/Monitoring http://stackoverflow.com/questions/7946699/iphone-data-usage-tracking-monitoring Data Usage Tracking Monitoring I've searched over this topic but found very few details which were helpful. With these details I've..
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