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2014/10/15 ¤U¤È 10:03:30
iphone Programming Glossary: addobserverHow 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 void viewWillAppear BOOL animated check for internet connection NSNotificationCenter defaultCenter addObserver self selector @selector checkNetworkStatus name kReachabilityChangedNotification object nil internetReachable..
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 BOOL animated register for keyboard notifications NSNotificationCenter defaultCenter addObserver self selector @selector keyboardWillShow name UIKeyboardWillShowNotification object nil NSNotificationCenter.. name UIKeyboardWillShowNotification object nil NSNotificationCenter defaultCenter addObserver self selector @selector keyboardWillHide name UIKeyboardWillHideNotification object nil void viewWillDisappear..
http://stackoverflow.com/questions/1328638/placeholder-in-uitextview self setPlaceholderColor UIColor lightGrayColor NSNotificationCenter defaultCenter addObserver self selector @selector textChanged name UITextViewTextDidChangeNotification object nil id initWithFrame.. @ self setPlaceholderColor UIColor lightGrayColor NSNotificationCenter defaultCenter addObserver self selector @selector textChanged name UITextViewTextDidChangeNotification object nil return self..
How to programatically check whether a keyboard is present in iphone app? http://stackoverflow.com/questions/1490573/how-to-programatically-check-whether-a-keyboard-is-present-in-iphone-app id init if self super init NSNotificationCenter center NSNotificationCenter defaultCenter center addObserver self selector @selector didShow name UIKeyboardDidShowNotification object nil center addObserver self.. addObserver self selector @selector didShow name UIKeyboardDidShowNotification object nil center addObserver self selector @selector didHide name UIKeyboardWillHideNotification object nil return self @end share..
http://stackoverflow.com/questions/1861656/iphone-reachability-checking but manage instances Reachability reachability in .m file NSNotificationCenter defaultCenter addObserver self selector @selector handleNetworkChange name kReachabilityChangedNotification object nil reachability..
Detect backspace in UITextField http://stackoverflow.com/questions/1977934/detect-backspace-in-uitextfield I've added the following code while creating my text field NSNotificationCenter defaultCenter addObserver self selector @selector handleTextFieldChanged name UITextFieldTextDidChangeNotification object searchTextField..
Send and receive messages through NSNotificationCenter in Objective-C? [closed] http://stackoverflow.com/questions/2191594/send-and-receive-messages-through-nsnotificationcenter-in-objective-c you when the notification was posted by that particular object. NSNotificationCenter defaultCenter addObserver self selector @selector receiveTestNotification name @ TestNotification object nil return self void..
program access to iPhone volume buttons http://stackoverflow.com/questions/772832/program-access-to-iphone-volume-buttons 18.0 340.0 284.0 23.0 autorelease self view addSubview volume NSNotificationCenter defaultCenter addObserver self selector @selector volumeChanged name @ AVSystemController_SystemVolumeDidChangeNotification..
iCloud basics and code sample [closed] http://stackoverflow.com/questions/7795629/icloud-basics-and-code-sample @ text.txt query setPredicate pred FINISHED NSNotificationCenter defaultCenter addObserver self selector @selector queryDidFinishGathering name NSMetadataQueryDidFinishGatheringNotification object..
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 methods called init or viewWillAppear or viewDidLoad etc void viewWillAppear BOOL animated check for internet connection NSNotificationCenter defaultCenter addObserver self selector @selector checkNetworkStatus name kReachabilityChangedNotification object nil internetReachable Reachability reachabilityForInternetConnection internetReachable..
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 self.view.frame rect UIView commitAnimations void viewWillAppear BOOL animated register for keyboard notifications NSNotificationCenter defaultCenter addObserver self selector @selector keyboardWillShow name UIKeyboardWillShowNotification object nil NSNotificationCenter defaultCenter addObserver self selector @selector.. defaultCenter addObserver self selector @selector keyboardWillShow name UIKeyboardWillShowNotification object nil NSNotificationCenter defaultCenter addObserver self selector @selector keyboardWillHide name UIKeyboardWillHideNotification object nil void viewWillDisappear BOOL animated unregister for keyboard notifications..
http://stackoverflow.com/questions/1328638/placeholder-in-uitextview if self.placeholder self setPlaceholder @ if self.placeholderColor self setPlaceholderColor UIColor lightGrayColor NSNotificationCenter defaultCenter addObserver self selector @selector textChanged name UITextViewTextDidChangeNotification object nil id initWithFrame CGRect frame if self super initWithFrame frame self setPlaceholder.. CGRect frame if self super initWithFrame frame self setPlaceholder @ self setPlaceholderColor UIColor lightGrayColor NSNotificationCenter defaultCenter addObserver self selector @selector textChanged name UITextViewTextDidChangeNotification object nil return self void textChanged NSNotification notification if self placeholder..
How to programatically check whether a keyboard is present in iphone app? http://stackoverflow.com/questions/1490573/how-to-programatically-check-whether-a-keyboard-is-present-in-iphone-app void didShow _isVisible YES void didHide _isVisible NO id init if self super init NSNotificationCenter center NSNotificationCenter defaultCenter center addObserver self selector @selector didShow name UIKeyboardDidShowNotification object nil center addObserver self selector @selector didHide name UIKeyboardWillHideNotification..
http://stackoverflow.com/questions/1861656/iphone-reachability-checking declare Reachability you no longer have a singleton but manage instances Reachability reachability in .m file NSNotificationCenter defaultCenter addObserver self selector @selector handleNetworkChange name kReachabilityChangedNotification object nil reachability Reachability reachabilityForInternetConnection reachability..
Detect backspace in UITextField http://stackoverflow.com/questions/1977934/detect-backspace-in-uitextfield empty. Based on the suggestion from @Alex Reynolds in a comment I've added the following code while creating my text field NSNotificationCenter defaultCenter addObserver self selector @selector handleTextFieldChanged name UITextFieldTextDidChangeNotification object searchTextField This notification is received handleTextFieldChanged..
Send and receive messages through NSNotificationCenter in Objective-C? [closed] http://stackoverflow.com/questions/2191594/send-and-receive-messages-through-nsnotificationcenter-in-objective-c rather than nil the notification center will only notify you when the notification was posted by that particular object. NSNotificationCenter defaultCenter addObserver self selector @selector receiveTestNotification name @ TestNotification object nil return self void receiveTestNotification NSNotification notification notification..
program access to iPhone volume buttons http://stackoverflow.com/questions/772832/program-access-to-iphone-volume-buttons volume MPVolumeView alloc initWithFrame CGRectMake 18.0 340.0 284.0 23.0 autorelease self view addSubview volume NSNotificationCenter defaultCenter addObserver self selector @selector volumeChanged name @ AVSystemController_SystemVolumeDidChangeNotification object nil for UIView view in volume subviews if view class..
iCloud basics and code sample [closed] http://stackoverflow.com/questions/7795629/icloud-basics-and-code-sample NSPredicate pred NSPredicate predicateWithFormat @ K @ NSMetadataItemFSNameKey @ text.txt query setPredicate pred FINISHED NSNotificationCenter defaultCenter addObserver self selector @selector queryDidFinishGathering name NSMetadataQueryDidFinishGatheringNotification object query query startQuery BOOL application UIApplication..
Get notification when NSOperationQueue finishes all tasks http://stackoverflow.com/questions/1049001/get-notification-when-nsoperationqueue-finishes-all-tasks if your queue has completed by checking for queue.operations count 0 . When you setup your queue do this self.queue addObserver self forKeyPath @ operations options 0 context NULL Then do this in your observeValueForKeyPath void observeValueForKeyPath..
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 or viewDidLoad etc void viewWillAppear BOOL animated check for internet connection NSNotificationCenter defaultCenter addObserver self selector @selector checkNetworkStatus name kReachabilityChangedNotification object nil internetReachable Reachability..
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 void viewWillAppear BOOL animated register for keyboard notifications NSNotificationCenter defaultCenter addObserver self selector @selector keyboardWillShow name UIKeyboardWillShowNotification object nil NSNotificationCenter defaultCenter.. @selector keyboardWillShow name UIKeyboardWillShowNotification object nil NSNotificationCenter defaultCenter addObserver self selector @selector keyboardWillHide name UIKeyboardWillHideNotification object nil void viewWillDisappear BOOL..
http://stackoverflow.com/questions/1328638/placeholder-in-uitextview @ if self.placeholderColor self setPlaceholderColor UIColor lightGrayColor NSNotificationCenter defaultCenter addObserver self selector @selector textChanged name UITextViewTextDidChangeNotification object nil id initWithFrame CGRect frame if.. frame self setPlaceholder @ self setPlaceholderColor UIColor lightGrayColor NSNotificationCenter defaultCenter addObserver self selector @selector textChanged name UITextViewTextDidChangeNotification object nil return self void textChanged NSNotification..
iphone: Calculating battery life http://stackoverflow.com/questions/1469549/iphone-calculating-battery-life currentDevice batteryLevel UIDevice currentDevice setBatteryMonitoringEnabled YES NSNotificationCenter defaultCenter addObserver self selector @selector batteryStateDidChange name UIDeviceBatteryStateDidChangeNotification object nil NSNotificationCenter.. name UIDeviceBatteryStateDidChangeNotification object nil NSNotificationCenter defaultCenter addObserver self selector @selector batteryLevelDidChange name UIDeviceBatteryLevelDidChangeNotification object nil The first..
How to programatically check whether a keyboard is present in iphone app? http://stackoverflow.com/questions/1490573/how-to-programatically-check-whether-a-keyboard-is-present-in-iphone-app didHide _isVisible NO id init if self super init NSNotificationCenter center NSNotificationCenter defaultCenter center addObserver self selector @selector didShow name UIKeyboardDidShowNotification object nil center addObserver self selector @selector.. defaultCenter center addObserver self selector @selector didShow name UIKeyboardDidShowNotification object nil center addObserver self selector @selector didHide name UIKeyboardWillHideNotification object nil return self @end share improve this answer..
http://stackoverflow.com/questions/1610542/custom-iphone-keyboard keyboard to your own needs. First register to be notified when it appears on screen NSNotificationCenter defaultCenter addObserver self selector @selector modifyKeyboard name UIKeyboardWillShowNotification object nil Then in your modifyKeyboard..
http://stackoverflow.com/questions/1861656/iphone-reachability-checking longer have a singleton but manage instances Reachability reachability in .m file NSNotificationCenter defaultCenter addObserver self selector @selector handleNetworkChange name kReachabilityChangedNotification object nil reachability Reachability reachabilityForInternetConnection..
Detect backspace in UITextField http://stackoverflow.com/questions/1977934/detect-backspace-in-uitextfield Reynolds in a comment I've added the following code while creating my text field NSNotificationCenter defaultCenter addObserver self selector @selector handleTextFieldChanged name UITextFieldTextDidChangeNotification object searchTextField This notification..
UIImagePickerController in Landscape http://stackoverflow.com/questions/2083672/uiimagepickercontroller-in-landscape beginGeneratingDeviceOrientationNotifications Refer to the method didRotate NSNotificationCenter defaultCenter addObserver self selector @selector didRotate name @ UIDeviceOrientationDidChangeNotification object nil Set the picker source as the..
Send and receive messages through NSNotificationCenter in Objective-C? [closed] http://stackoverflow.com/questions/2191594/send-and-receive-messages-through-nsnotificationcenter-in-objective-c will only notify you when the notification was posted by that particular object. NSNotificationCenter defaultCenter addObserver self selector @selector receiveTestNotification name @ TestNotification object nil return self void receiveTestNotification..
Handling applicationDidBecomeActive http://stackoverflow.com/questions/3639859/handling-applicationdidbecomeactive method that you want to call when that notification gets sent to your application. NSNotificationCenter defaultCenter addObserver self selector @selector someMethod name UIApplicationDidBecomeActiveNotification object nil Don't forget to clean up..
Why does viewWillAppear not get called when an app comes back from the background? http://stackoverflow.com/questions/5277940/why-does-viewwillappear-not-get-called-when-an-app-comes-back-from-the-backgroun being called when the app returns to the foreground. I know that I can implement NSNotificationCenter defaultCenter addObserver self selector @selector statusBarFrameChanged name UIApplicationDidChangeStatusBarFrameNotification object nil but I don't.. stuff Then also you trigger doMyLayoutStuff from the appropriate notification NSNotificationCenter defaultCenter addObserver self selector @selector doMyLayoutStuff name UIApplicationDidChangeStatusBarFrameNotification object self There's no out..
program access to iPhone volume buttons http://stackoverflow.com/questions/772832/program-access-to-iphone-volume-buttons CGRectMake 18.0 340.0 284.0 23.0 autorelease self view addSubview volume NSNotificationCenter defaultCenter addObserver self selector @selector volumeChanged name @ AVSystemController_SystemVolumeDidChangeNotification object nil for UIView..
iCloud basics and code sample [closed] http://stackoverflow.com/questions/7795629/icloud-basics-and-code-sample @ K @ NSMetadataItemFSNameKey @ text.txt query setPredicate pred FINISHED NSNotificationCenter defaultCenter addObserver self selector @selector queryDidFinishGathering name NSMetadataQueryDidFinishGatheringNotification object query query startQuery..
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