If you need to fake a touch event and not simply call a UIButtons method, you can use this: [MyButtonName sendActionsForControlEvents: UIControlEventTouchUpInside];
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Updating UI Controls On Background Threads
It is strongly recommended not to update UI controls etc from a background thread (e.g. a timer, comms etc). This can be the cause of crashes which are sometimes very hard to identify. Instead use these to force code to be executed on the UI thread (which is always the “main” thread). Dispatch Async And Dispatch Sync […]
Getting App Version Number
Get Build Version Number [[[NSBundle mainBundle] infoDictionary] objectForKey:@”CFBundleVersion”]]
Read System Volume Setting
Reading the current system audio volume MPMusicPlayerController *iPod = [MPMusicPlayerController iPodMusicPlayer]; float volumeLevel = iPod.volume; NSLog(@”Volume: %f”, volumeLevel); You need to import the MediaPlayer framework and use: #import <MediaPlayer/MediaPlayer.h> Other resources http://stackoverflow.com/questions/7255006/get-system-volume-ios
C Arrays
Using C Arrays UInt8 MyArray[10]; MyArray[0] = 0x00; MyArray[1] = 0x01; int LengthOfMyArray = length:sizeof(MyArray);
UIView
Referencing A View In A .xib In #ViewController.h @interface SomeViewController : UIViewController { UIView *MyView; { @property (nonatomic, retain) IBOutlet UIView *MyView; In #ViewController.m @synthesize MyView; //<<<<DON’T FORGET THIS! – (void)viewDidUnload { self.MyView = nil; } Creating Programatically UIView *MyView = [[[UIView alloc] init] autorelease]; Moving A UIView CGRect frame = self.MyView.frame; frame.origin.x = 0; […]
Get Device IP Address
This code is based on Shivan Raptor’s answer at http://stackoverflow.com/questions/7072989/iphone-ipad-how-to-get-my-ip-address-programmatically //**************************************** //**************************************** //********** GET OUR IP ADDRESS ********** //**************************************** //**************************************** #import #import // Get IP Address – (NSString *)GetOurIpAddress { NSString *address = @”error”; struct ifaddrs *interfaces = NULL; struct ifaddrs *temp_addr = NULL; int success = 0; // retrieve the current interfaces – returns 0 […]
Disabling App Auto Sleep
If the screen isn’t touched after a time period an iPhone will go to sleep. Use this to disable this function: //Disable device auto sleep timer [[UIApplication sharedApplication] setIdleTimerDisabled:YES];
Rich Text Labels
A label won’t take rich text so you have two choices, use a WebView or multiple labels styled as required. Don’t dismiss the idea of just using multiple labels, even labels over the top of text to highlight individual words. It’s not pretty but it does work. One really annoying gotcha of the webview […]
Where To Store Files
Documents Directory Only documents and other data that is user-generated, or that cannot otherwise be recreated by your application, should be stored in the <Application_Home>/Documents directory and will be automatically backed up by iCloud. NSString *FilePath = [NSHomeDirectory() stringByAppendingPathComponent:@”Documents/users.xml”]; Caches Directory Data that can be downloaded again or regenerated should be stored in the […]