iphone Programming Glossary: selector

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

BOOL animated check for internet connection NSNotificationCenter defaultCenter addObserver self selector @selector checkNetworkStatus name kReachabilityChangedNotification object nil internetReachable Reachability.. check for internet connection NSNotificationCenter defaultCenter addObserver self selector @selector checkNetworkStatus name kReachabilityChangedNotification object nil internetReachable Reachability reachabilityForInternetConnection..

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

animated register for keyboard notifications NSNotificationCenter defaultCenter addObserver self selector @selector keyboardWillShow name UIKeyboardWillShowNotification object nil NSNotificationCenter defaultCenter.. for keyboard notifications NSNotificationCenter defaultCenter addObserver self selector @selector keyboardWillShow name UIKeyboardWillShowNotification object nil NSNotificationCenter defaultCenter.. UIKeyboardWillShowNotification object nil NSNotificationCenter defaultCenter addObserver self selector @selector keyboardWillHide name UIKeyboardWillHideNotification object nil void viewWillDisappear..

Send and receive messages through NSNotificationCenter in Objective-C? [closed]

http://stackoverflow.com/questions/2191594/send-and-receive-messages-through-nsnotificationcenter-in-objective-c

center to inform us of TestNotification notifications using the receiveTestNotification selector. By specifying object nil we tell the notification center that we are not interested in who posted the.. was posted by that particular object. NSNotificationCenter defaultCenter addObserver self selector @selector receiveTestNotification name @ TestNotification object nil return self void receiveTestNotification.. posted by that particular object. NSNotificationCenter defaultCenter addObserver self selector @selector receiveTestNotification name @ TestNotification object nil return self void receiveTestNotification..

How do I create delegates in Objective-C?

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

message using respondsToSelector and send it if appropriate. if self delegate respondsToSelector @selector windowDidMove self delegate windowDidMove notification The delegate property itself is typically declared.. better tool support. Speed Optimizations Instead of checking whether a delegate responds to a selector every time we want to message it you can cache that information when delegates are set. One very clean.. aDelegate delegate aDelegate delegateRespondsTo.didFinishLoadingItem delegate respondsToSelector @selector something didFinishLoadingItem delegateRespondsTo.didFailWithError delegate respondsToSelector @selector..

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

may cause a leak because its selector is unknown I'm getting the following warning by the ARC compiler performSelector may cause a leak because.. I'm getting the following warning by the ARC compiler performSelector may cause a leak because its selector is unknown . Here's what I'm doing _controller performSelector NSSelectorFromString @ someMethod Why.. @ someMethod Why do I get this warning I understand the compiler can't check if the selector exists or not but why would that cause a leak And how can I change my code so that I don't get this..

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

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.. 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 startNotifier..

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

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 keyboardWillHide.. 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 keyboardWillHide .. 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 while not..

Send and receive messages through NSNotificationCenter in Objective-C? [closed]

http://stackoverflow.com/questions/2191594/send-and-receive-messages-through-nsnotificationcenter-in-objective-c

as an observer of the TestNotification. We tell the notification center to inform us of TestNotification notifications using the receiveTestNotification selector. By specifying object nil we tell the notification center that we are not interested in who posted the notification. If you provided an actual object rather than.. 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 name should.. 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 name should always..

How do I create delegates in Objective-C?

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

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 property itself is typically declared weak in ARC or assign pre ARC to avoid retain loops since.. it is more precise doesn't mess with NSObject and can provide better tool support. Speed Optimizations Instead of checking whether a delegate responds to a selector every time we want to message it you can cache that information when delegates are set. One very clean way to do this is to use a bitfield as follows @protocol.. setDelegate id JSSomethingDelegate aDelegate if delegate aDelegate delegate aDelegate delegateRespondsTo.didFinishLoadingItem delegate respondsToSelector @selector something didFinishLoadingItem delegateRespondsTo.didFailWithError delegate respondsToSelector @selector something didFailWithError @end Then in the body we can..

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

may cause a leak because its selector is unknown I'm getting the following warning by the ARC compiler performSelector may cause a leak because its selector is unknown . Here's what I'm doing _controller.. may cause a leak because its selector is unknown I'm getting the following warning by the ARC compiler performSelector may cause a leak because its selector is unknown . Here's what I'm doing _controller performSelector NSSelectorFromString @ someMethod Why do I get this warning I understand the compiler can't check.. . Here's what I'm doing _controller performSelector NSSelectorFromString @ someMethod Why do I get this warning I understand the compiler can't check if the selector exists or not but why would that cause a leak And how can I change my code so that I don't get this warning anymore iphone objective c ios automatic ref counting..

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

void viewWillAppear BOOL animated check for internet connection NSNotificationCenter defaultCenter addObserver self selector @selector checkNetworkStatus name kReachabilityChangedNotification object nil internetReachable Reachability reachabilityForInternetConnection.. BOOL animated check for internet connection NSNotificationCenter defaultCenter addObserver self selector @selector checkNetworkStatus name kReachabilityChangedNotification object nil internetReachable Reachability reachabilityForInternetConnection..

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

viewWillAppear BOOL animated register for keyboard notifications NSNotificationCenter defaultCenter addObserver self selector @selector keyboardWillShow name UIKeyboardWillShowNotification object nil NSNotificationCenter defaultCenter addObserver.. BOOL animated register for keyboard notifications NSNotificationCenter defaultCenter addObserver self selector @selector keyboardWillShow name UIKeyboardWillShowNotification object nil NSNotificationCenter defaultCenter addObserver self.. name UIKeyboardWillShowNotification object nil NSNotificationCenter defaultCenter addObserver self selector @selector keyboardWillHide name UIKeyboardWillHideNotification object nil void viewWillDisappear BOOL animated unregister..

Send and receive messages through NSNotificationCenter in Objective-C? [closed]

http://stackoverflow.com/questions/2191594/send-and-receive-messages-through-nsnotificationcenter-in-objective-c

We tell the notification center to inform us of TestNotification notifications using the receiveTestNotification selector. By specifying object nil we tell the notification center that we are not interested in who posted the notification. If.. 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.. 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..

How do I create delegates in Objective-C?

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

to the windowDidMove message using respondsToSelector and send it if appropriate. if self delegate respondsToSelector @selector windowDidMove self delegate windowDidMove notification The delegate property itself is typically declared weak in ARC or.. NSObject and can provide better tool support. Speed Optimizations Instead of checking whether a delegate responds to a selector every time we want to message it you can cache that information when delegates are set. One very clean way to do this is.. if delegate aDelegate delegate aDelegate delegateRespondsTo.didFinishLoadingItem delegate respondsToSelector @selector something didFinishLoadingItem delegateRespondsTo.didFailWithError delegate respondsToSelector @selector something didFailWithError..

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

may cause a leak because its selector is unknown I'm getting the following warning by the ARC compiler performSelector may cause a leak because its selector.. is unknown I'm getting the following warning by the ARC compiler performSelector may cause a leak because its selector is unknown . Here's what I'm doing _controller performSelector NSSelectorFromString @ someMethod Why do I get this warning.. NSSelectorFromString @ someMethod Why do I get this warning I understand the compiler can't check if the selector exists or not but why would that cause a leak And how can I change my code so that I don't get this warning anymore iphone..

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