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2014/10/15 ¤U¤È 10:15:51
iphone Programming Glossary: viewwillappearhttp://stackoverflow.com/questions/1031554/nstimer-doesnt-stop doesn't stop I've got a timer which fires when the viewWillAppear method is being called and invalidates when the viewDidDisappear method is being called. But after a.. firing even after it was invalidated. What's the problem Here is my code NSTimer timer void viewWillAppear BOOL animated super viewWillAppear animated timer NSTimer scheduledTimerWithTimeInterval 0.2f target.. What's the problem Here is my code NSTimer timer void viewWillAppear BOOL animated super viewWillAppear animated timer NSTimer scheduledTimerWithTimeInterval 0.2f target self selector @selector timerAction..
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 where you are implementing the check you can place this in one of the first methods called init or viewWillAppear or viewDidLoad etc void viewWillAppear BOOL animated check for internet connection NSNotificationCenter.. can place this in one of the first methods called init or viewWillAppear or viewDidLoad etc void viewWillAppear BOOL animated check for internet connection NSNotificationCenter defaultCenter addObserver self selector..
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.size.height kOFFSET_FOR_KEYBOARD self.view.frame rect UIView commitAnimations void viewWillAppear BOOL animated register for keyboard notifications NSNotificationCenter defaultCenter addObserver self..
iPhone viewWillAppear not firing http://stackoverflow.com/questions/131062/iphone-viewwillappear-not-firing viewWillAppear not firing I've read numerous posts about people having problems with viewWillAppear when you do not.. viewWillAppear not firing I've read numerous posts about people having problems with viewWillAppear when you do not create your view hierarchy just right. My problem is I can't figure out what that means... and call addSubView on that controller I would expect the added view s to be wired up for viewWillAppear events. Does anyone have an example of a complex programmatic view heirarchy that successfully recieves..
“wait_fences: failed to receive reply: 10004003”? http://stackoverflow.com/questions/1371346/wait-fences-failed-to-receive-reply-10004003 the first time and only the first time my view is loaded due to the following line of code void viewWillAppear BOOL animated textField becomeFirstResponder There is a noticeable ~3 “Â second even on the simulator.. on Google. Strangely the opposite situation happens if I put the line in viewDidAppear instead of viewWillAppear that is instead of printing the error only the first time the keyboard is shown and never again the.. for me. iphone objective c cocoa touch share improve this question Override viewDidAppear not viewWillAppear and make sure to call super viewDidAppear . You should not perform animations when you are not on screen..
Custom animation for pushing a UIViewController http://stackoverflow.com/questions/1406037/custom-animation-for-pushing-a-uiviewcontroller nil UIView setAnimationDuration 4 UIView setAnimationCurve UIViewAnimationCurveEaseInOut coming viewWillAppear YES going viewWillAppear YES coming.view.frame CGRectMake 0 0 320 480 going viewDidDisappear YES coming.. 4 UIView setAnimationCurve UIViewAnimationCurveEaseInOut coming viewWillAppear YES going viewWillAppear YES coming.view.frame CGRectMake 0 0 320 480 going viewDidDisappear YES coming viewDidAppear YES UIView..
How do I detect when someone shakes an iPhone? http://stackoverflow.com/questions/150446/how-do-i-detect-when-someone-shakes-an-iphone a view . In the view controller you want to set this view to become first responder void viewWillAppear BOOL animated shakeView becomeFirstResponder super viewWillAppear animated void viewWillDisappear BOOL.. to become first responder void viewWillAppear BOOL animated shakeView becomeFirstResponder super viewWillAppear animated void viewWillDisappear BOOL animated shakeView resignFirstResponder super viewWillDisappear..
View Controllers: How to switch between views programmatically? http://stackoverflow.com/questions/910994/view-controllers-how-to-switch-between-views-programmatically the app. But now the big question is A View Controller typically has all those methods like void viewWillAppear BOOL animated void viewDidDisappear BOOL animated void viewDidLoad ...and so on. Who or what or how.. the view get's visible would I have to take care about calling those methods How does it know that viewWillAppear viewDidDisappear or viewDidLoad I believe that the Tab Bar Controller has all this cleverness under.. 0 2. appear insert disappear remove if blueViewController.view.superview nil blueViewController viewWillAppear YES yellowViewController viewWillDisappear YES yellowViewController.view removeFromSuperview self.view..
http://stackoverflow.com/questions/1031554/nstimer-doesnt-stop doesn't stop I've got a timer which fires when the viewWillAppear method is being called and invalidates when the viewDidDisappear method is being called. But after a certain amount of switching between views the timer continues.. a certain amount of switching between views the timer continues firing even after it was invalidated. What's the problem Here is my code NSTimer timer void viewWillAppear BOOL animated super viewWillAppear animated timer NSTimer scheduledTimerWithTimeInterval 0.2f target self selector @selector timerAction userInfo nil repeats.. views the timer continues firing even after it was invalidated. What's the problem Here is my code NSTimer timer void viewWillAppear BOOL animated super viewWillAppear animated timer NSTimer scheduledTimerWithTimeInterval 0.2f target self selector @selector timerAction userInfo nil repeats YES void viewDidDisappear BOOL animated..
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 where you are implementing the check 7 In the .m file of where you are implementing the check you can place this in one of the first methods called init or viewWillAppear or viewDidLoad etc void viewWillAppear BOOL animated check for internet connection NSNotificationCenter defaultCenter addObserver self selector @selector checkNetworkStatus.. 7 In the .m file of where you are implementing the check you can place this in one of the first 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..
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 revert back to the normal state. rect.origin.y kOFFSET_FOR_KEYBOARD rect.size.height kOFFSET_FOR_KEYBOARD self.view.frame rect UIView commitAnimations void viewWillAppear BOOL animated register for keyboard notifications NSNotificationCenter defaultCenter addObserver self selector @selector keyboardWillShow name UIKeyboardWillShowNotification..
iPhone viewWillAppear not firing http://stackoverflow.com/questions/131062/iphone-viewwillappear-not-firing viewWillAppear not firing I've read numerous posts about people having problems with viewWillAppear when you do not create your view hierarchy just right. My problem is I can't.. viewWillAppear not firing I've read numerous posts about people having problems with viewWillAppear when you do not create your view hierarchy just right. My problem is I can't figure out what that means. If I create a RootViewController and call addSubView on.. I can't figure out what that means. If I create a RootViewController and call addSubView on that controller I would expect the added view s to be wired up for viewWillAppear events. Does anyone have an example of a complex programmatic view heirarchy that successfully recieves viewWillAppear events at every level Apple's Docs state..
“wait_fences: failed to receive reply: 10004003”? http://stackoverflow.com/questions/1371346/wait-fences-failed-to-receive-reply-10004003 to receive reply 10004003&rdquo I get this cryptic error the first time and only the first time my view is loaded due to the following line of code void viewWillAppear BOOL animated textField becomeFirstResponder There is a noticeable ~3 “Â second even on the simulator delay due to this that makes my app feel unresponsive. Does.. documentation on it on Apple's site or any solutions here or on Google. Strangely the opposite situation happens if I put the line in viewDidAppear instead of viewWillAppear that is instead of printing the error only the first time the keyboard is shown and never again the error is not printed the first time but every time after. This.. time but every time after. This is causing a major headache for me. iphone objective c cocoa touch share improve this question Override viewDidAppear not viewWillAppear and make sure to call super viewDidAppear . You should not perform animations when you are not on screen will appear . And the viewDidAppear docs explain that you..
Custom animation for pushing a UIViewController http://stackoverflow.com/questions/1406037/custom-animation-for-pushing-a-uiviewcontroller CGRectMake 160 160 0 0 UIView beginAnimations @ frame context nil UIView setAnimationDuration 4 UIView setAnimationCurve UIViewAnimationCurveEaseInOut coming viewWillAppear YES going viewWillAppear YES coming.view.frame CGRectMake 0 0 320 480 going viewDidDisappear YES coming viewDidAppear YES UIView commitAnimations My View is properly.. beginAnimations @ frame context nil UIView setAnimationDuration 4 UIView setAnimationCurve UIViewAnimationCurveEaseInOut coming viewWillAppear YES going viewWillAppear YES coming.view.frame CGRectMake 0 0 320 480 going viewDidDisappear YES coming viewDidAppear YES UIView commitAnimations My View is properly displayed but unfortunately..
How do I detect when someone shakes an iPhone? http://stackoverflow.com/questions/150446/how-do-i-detect-when-someone-shakes-an-iphone new type instead of the base type in IB or using it when allocating a view . In the view controller you want to set this view to become first responder void viewWillAppear BOOL animated shakeView becomeFirstResponder super viewWillAppear animated void viewWillDisappear BOOL animated shakeView resignFirstResponder super viewWillDisappear.. a view . In the view controller you want to set this view to become first responder void viewWillAppear BOOL animated shakeView becomeFirstResponder super viewWillAppear animated void viewWillDisappear BOOL animated shakeView resignFirstResponder super viewWillDisappear animated Don't forget that if you have other views that become..
View Controllers: How to switch between views programmatically? http://stackoverflow.com/questions/910994/view-controllers-how-to-switch-between-views-programmatically That works. I see the view from ViewControllerA when I start the app. But now the big question is A View Controller typically has all those methods like void viewWillAppear BOOL animated void viewDidDisappear BOOL animated void viewDidLoad ...and so on. Who or what or how would those methods be called if I do it my way without a tab.. I mean If I allocate that ViewController's class and the view get's visible would I have to take care about calling those methods How does it know that viewWillAppear viewDidDisappear or viewDidLoad I believe that the Tab Bar Controller has all this cleverness under the hood. Or am I wrong UPDATE I've tested it. If I release.. self.view insertSubview blueViewController.view atIndex 0 2. appear insert disappear remove if blueViewController.view.superview nil blueViewController viewWillAppear YES yellowViewController viewWillDisappear YES yellowViewController.view removeFromSuperview self.view insertSubview self.blueViewController.view atIndex 0 yellowViewController..
http://stackoverflow.com/questions/1031554/nstimer-doesnt-stop doesn't stop I've got a timer which fires when the viewWillAppear method is being called and invalidates when the viewDidDisappear method is being called. But after a certain amount of switching.. views the timer continues firing even after it was invalidated. What's the problem Here is my code NSTimer timer void viewWillAppear BOOL animated super viewWillAppear animated timer NSTimer scheduledTimerWithTimeInterval 0.2f target self selector @selector.. after it was invalidated. What's the problem Here is my code NSTimer timer void viewWillAppear BOOL animated super viewWillAppear animated timer NSTimer scheduledTimerWithTimeInterval 0.2f target self selector @selector timerAction userInfo nil repeats..
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 7 In the .m file of where you are implementing the check you can place this in one of the first methods called init or viewWillAppear or viewDidLoad etc void viewWillAppear BOOL animated check for internet connection NSNotificationCenter defaultCenter addObserver.. the check you can place this in one of the first methods called init or viewWillAppear or viewDidLoad etc void viewWillAppear BOOL animated check for internet connection NSNotificationCenter defaultCenter addObserver self selector @selector checkNetworkStatus..
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 kOFFSET_FOR_KEYBOARD rect.size.height kOFFSET_FOR_KEYBOARD self.view.frame rect UIView commitAnimations void viewWillAppear BOOL animated register for keyboard notifications NSNotificationCenter defaultCenter addObserver self selector @selector..
iPhone viewWillAppear not firing http://stackoverflow.com/questions/131062/iphone-viewwillappear-not-firing viewWillAppear not firing I've read numerous posts about people having problems with viewWillAppear when you do not create your view hierarchy.. viewWillAppear not firing I've read numerous posts about people having problems with viewWillAppear when you do not create your view hierarchy just right. My problem is I can't figure out what that means. If I create a RootViewController.. create a RootViewController and call addSubView on that controller I would expect the added view s to be wired up for viewWillAppear events. Does anyone have an example of a complex programmatic view heirarchy that successfully recieves viewWillAppear events..
“wait_fences: failed to receive reply: 10004003”? http://stackoverflow.com/questions/1371346/wait-fences-failed-to-receive-reply-10004003 get this cryptic error the first time and only the first time my view is loaded due to the following line of code void viewWillAppear BOOL animated textField becomeFirstResponder There is a noticeable ~3 “Â second even on the simulator delay due to this that.. solutions here or on Google. Strangely the opposite situation happens if I put the line in viewDidAppear instead of viewWillAppear that is instead of printing the error only the first time the keyboard is shown and never again the error is not printed.. a major headache for me. iphone objective c cocoa touch share improve this question Override viewDidAppear not viewWillAppear and make sure to call super viewDidAppear . You should not perform animations when you are not on screen will appear . And..
Custom animation for pushing a UIViewController http://stackoverflow.com/questions/1406037/custom-animation-for-pushing-a-uiviewcontroller @ frame context nil UIView setAnimationDuration 4 UIView setAnimationCurve UIViewAnimationCurveEaseInOut coming viewWillAppear YES going viewWillAppear YES coming.view.frame CGRectMake 0 0 320 480 going viewDidDisappear YES coming viewDidAppear YES.. UIView setAnimationDuration 4 UIView setAnimationCurve UIViewAnimationCurveEaseInOut coming viewWillAppear YES going viewWillAppear YES coming.view.frame CGRectMake 0 0 320 480 going viewDidDisappear YES coming viewDidAppear YES UIView commitAnimations..
How do I detect when someone shakes an iPhone? http://stackoverflow.com/questions/150446/how-do-i-detect-when-someone-shakes-an-iphone or using it when allocating a view . In the view controller you want to set this view to become first responder void viewWillAppear BOOL animated shakeView becomeFirstResponder super viewWillAppear animated void viewWillDisappear BOOL animated shakeView.. want to set this view to become first responder void viewWillAppear BOOL animated shakeView becomeFirstResponder super viewWillAppear animated void viewWillDisappear BOOL animated shakeView resignFirstResponder super viewWillDisappear animated Don't forget..
View Controllers: How to switch between views programmatically? http://stackoverflow.com/questions/910994/view-controllers-how-to-switch-between-views-programmatically when I start the app. But now the big question is A View Controller typically has all those methods like void viewWillAppear BOOL animated void viewDidDisappear BOOL animated void viewDidLoad ...and so on. Who or what or how would those methods.. class and the view get's visible would I have to take care about calling those methods How does it know that viewWillAppear viewDidDisappear or viewDidLoad I believe that the Tab Bar Controller has all this cleverness under the hood. Or am I wrong.. atIndex 0 2. appear insert disappear remove if blueViewController.view.superview nil blueViewController viewWillAppear YES yellowViewController viewWillDisappear YES yellowViewController.view removeFromSuperview self.view insertSubview self.blueViewController.view..
Do I programatically add SubViews in ViewDidAppear, ViewDidLoad, ViewWillAppear, the constructor? http://stackoverflow.com/questions/2280423/do-i-programatically-add-subviews-in-viewdidappear-viewdidload-viewwillappear is hidden somewhere. Is there a general rule to keep to for adding them iphone monotouch viewdidload viewdidappear viewwillappear share improve this question In general this is what I do ViewDidLoad Whenever I'm adding controls to a view that should..
Problems with UINavigationController inside of UITabBarController, viewWillAppear not called http://stackoverflow.com/questions/3063610/problems-with-uinavigationcontroller-inside-of-uitabbarcontroller-viewwillappea a solution but maybe an inside of something that is going on. iphone uinavigationcontroller uitableviewcontroller viewwillappear share improve this question To answer my own question I found out what the problem was. In order to abide by Apple's..
viewWillAppear, viewDidAppear not being called, not firing http://stackoverflow.com/questions/3560669/viewwillappear-viewdidappear-not-being-called-not-firing and I called the methods accordingly and all was solved. Attribution on the solution http davidebenini.it 2009 01 03 viewwillappear not being called inside a uinavigationcontroller iphone objective c uitabbarcontroller viewwillappear share improve this.. 2009 01 03 viewwillappear not being called inside a uinavigationcontroller iphone objective c uitabbarcontroller viewwillappear share improve this question I'm going to go ahead and disagree with @St3fan and use UIKit as the counter example. However..
iOS 4: FigCreateCGImageFromJPEG returned -1 http://stackoverflow.com/questions/3629785/ios-4-figcreatecgimagefromjpeg-returned-1 info straight to my UIImageView I retain it in a UIImage variable then dismiss the ModalViewcontroller. In the viewwillappear method of the root viewcontroller I then assign the image to my UIImageView.image. I don't know if the order I was doing..
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 Does anybody know the proper way to deal with this I'm sure I'm missing an obvious solution. iphone objective c viewwillappear share improve this question The method viewWillAppear should be taken in the context of what is going on in your own..
What is meaning of calling superview's viewwillappear? http://stackoverflow.com/questions/5632511/what-is-meaning-of-calling-superviews-viewwillappear is meaning of calling superview's viewwillappear void viewwillAppear super viewwillAppear animated What does mean of calling super viewwillAppear animated and what happen..
Add image to UIBarButtonItem button http://stackoverflow.com/questions/6817469/add-image-to-uibarbuttonitem-button in baseviewcontroller and I add it like following it doesn't work I had to use the code given in my accepted answer in viewwillappear favButton addTarget self action @selector favouriteButtonClicked forControlEvents UIControlEventTouchUpInside self.navigationItem.rightBarButtonItem..
Popping ViewController doesn't call viewWillAppear when going back http://stackoverflow.com/questions/6859868/popping-viewcontroller-doesnt-call-viewwillappear-when-going-back
Taking a picture from the camera and show it in a UIImageView http://stackoverflow.com/questions/7820511/taking-a-picture-from-the-camera-and-show-it-in-a-uiimageview another one in portrait the app crashs. Do I have to release something iphone objective c ios uiimagepickercontroller viewwillappear share improve this question I had the same issue there is no edited image when using the camera you must use the original..
How to enable and disable cells in uitableview [closed] http://stackoverflow.com/questions/9974485/how-to-enable-and-disable-cells-in-uitableview
Do I programatically add SubViews in ViewDidAppear, ViewDidLoad, ViewWillAppear, the constructor? http://stackoverflow.com/questions/2280423/do-i-programatically-add-subviews-in-viewdidappear-viewdidload-viewwillappear I programatically add SubViews in ViewDidAppear ViewDidLoad ViewWillAppear the constructor I'm trying to figure out from Apple's sketchy documentation which method is the best place to be initializing.. Here AddViews public override ViewDidLoad base.ViewDidLoad Or is should it be here AddViews public override ViewWillAppear bool base.ViewWillAppear animated Here AddViews public override ViewDidAppear bool animated base.ViewDidLoad animated Or.. public override ViewDidLoad base.ViewDidLoad Or is should it be here AddViews public override ViewWillAppear bool base.ViewWillAppear animated Here AddViews public override ViewDidAppear bool animated base.ViewDidLoad animated Or maybe here AddViews void..
Storing UITextField contents before view pops http://stackoverflow.com/questions/4061788/storing-uitextfield-contents-before-view-pops has a bunch of UITextFields in it. If one of them is being editing when the back button is touched the original view's ViewWillAppear method is called before either the UITextField delegate methods of textFieldShouldEndEditing or textFieldDidEndEditing or..
http://stackoverflow.com/questions/4813744/weird-crash-in-abpeoplepicker NO and then returns back down the stack to ABPeoplePicker returning NO for the shouldContinue. Setting a breakpoint in ViewWillAppear to the parent routine the highwater mark I see a stack that looks like #0 RunnerListTableViewController viewWillAppear self..
What is the difference between -viewWillAppear: and -viewDidAppear:? http://stackoverflow.com/questions/5630649/what-is-the-difference-between-viewwillappear-and-viewdidappear if my view is a form with 3 labels I would add the labels here the view will never exist without those forms. 2 ViewWillAppear I use ViewWillAppear usually just to update the data on the form. So for the example above I would use this to actually.. a form with 3 labels I would add the labels here the view will never exist without those forms. 2 ViewWillAppear I use ViewWillAppear usually just to update the data on the form. So for the example above I would use this to actually load the data from my.. into the form. Creation of UIViews is fairly expensive and you should avoid as much as possible doing that on the ViewWillAppear method becuase when this gets called it means that the iPhone is already ready to show the UIView to the user and anything..
How do you register for UIApplicationWillEnterForegroundNotification in MonoTouch http://stackoverflow.com/questions/5967232/how-do-you-register-for-uiapplicationwillenterforegroundnotification-in-monotouc do you register for UIApplicationWillEnterForegroundNotification in MonoTouch I have a problem that the ViewWillAppear method for a UIView does not fire when the application returns from the background. This is a problem as my main application..
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