nsnotificationcenter

Clicking on Like all the view should show like objective C

由 徘徊边缘 提交于 2019-12-07 01:02:28
When I select Throwback -> Description occurs if I click on like button the like button changes to unlike and " like count=1099" increases. If I press back I want this unlike to be displayed next to Throwback let say in a label and again select Throwback button should display unlike and like Count should be 1100. please Help how can i achieve this ? //DetailOfUser.m #impot"DetailsOfStories.h" @interface DetailOfUser ()<UITableViewDelegate,UITableViewDataSource> { NSMutableArray *arrayAboutList; DetailsOfStories *viewController; } - (UITableViewCell *)tableView:(UITableView *)theTableView

Detect rotation changes in iOS

由 馋奶兔 提交于 2019-12-06 17:46:19
问题 I am making an iOS app that needs to do a little interface rearrangement upon rotation. I am trying to detect this by implementing - (void)orientationChanged:(NSNotification *)note , but this gives me notifications for when the device is face up or face down. I want a way to just get notified when the interface changes orientations. 回答1: Since iOS 8, above methods were deprecated, and the proper way to handle and detect device rotation is: -(void) viewWillTransitionToSize:(CGSize)size

Play MP4 using MPMoviePlayerController() in Swift

由 ℡╲_俬逩灬. 提交于 2019-12-06 16:31:59
问题 I can't for the life of me figure out a way to play an MP4 that takes up the entire background in a UIViewController . So far I have the following, which doesn't even play the video at all. I can confirm that the bokeh.mp4 video exists because if I change the file to something else then it throws an error that it's missing. override func viewDidAppear(animated: Bool) { let filePath = NSBundle.mainBundle().pathForResource("bokeh", ofType: "mp4") self.moviePlayerController.contentURL = NSURL

iOS : Why our app sometimes doesn't show in the Notification Center?

由 ∥☆過路亽．° 提交于 2019-12-06 11:07:09
There are 3 kinds of situations about this problem. During the development, I can restart the iPhone and reinstall the app to solve this problem. At first, this problem often occurs in the jailbreak iPhone, so we think that there may be something wrong with the Provisioning Profiles. But now, more and more users complain about this (could not receive push), who use the normal iPhone (not jailbreak) and download our app from the App Store. So, I'm confused, and a little worried, about why our app doesn't show in the notification center, and how we can help the users to solve the problem. Many

iOS - NSNotificationCenter multiple UIKeyboard notification

由 随声附和 提交于 2019-12-06 07:38:52
I have two view controllers let's call them A and B (1) in A I show a popOver containing a textField (2) in B there is an UITextView used for simple text editing I Have to manage the keyboard in A and in B to scroll the content hidden by the keyboard. I know how to reposition the content. What I need is a way to have different behavior on the same notifications types that in my are UIKeyboardWill(Show/Hide)Notification. What I've done so far : (1) I've added this code in each controller [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardDidAppear:) name

is removeObserver necessary on dealloc?

由 核能气质少年 提交于 2019-12-06 07:23:53
问题 In one of my view controller, it adds itself as observer of UITextViewTextDidEndEditingNotification notification, like the following does [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(done:) name:UITextViewTextDidEndEditingNotification object:nil]; Now I am wondering - do I need to do the following when the view controller is dealloc'd [[NSNotificationCenter defaultCenter] removeObserver:self]; 回答1: yes, you should always remove any observers when they're being

iOS Detect system volume level change. private API or not? AVSystemController_SystemVolumeDidChangeNotification

由 不想你离开。 提交于 2019-12-05 20:51:40
问题 Can listening to AVSystemController_SystemVolumeDidChangeNotification NSNotification be considered (during the App Store review process) as using private API? In my application I need to display and update the current volume level. Volume indicator should be updated after pressing hardware volume buttons and after volume change in MPVolumeView slider. I've searched solution how to get notification or event of hardware volume button press and had found a number of solutions. For example,

Swift 2 addObserver for specific textField with the object parameter

由 喜夏-厌秋 提交于 2019-12-05 16:57:54
To my understanding the object parameter of the addObserver method is the object you want to receive notifications from. Most of the time I see it as nil (I assume this is because notifications of the specified type are wanted from all objects). In my particular case I have a text field at the top of the screen and at the bottom of the screen and I want the view to move up only when the user taps the bottom text field, not the top one. So I call the following method in viewWillAppear func subscribeToKeyboardNotifications() { NSNotificationCenter.defaultCenter().addObserver(self, selector:

How to know where crash for postNotificationName:object:userInfo

由 三世轮回 提交于 2019-12-05 16:30:57
Is there some method to know crash reason in Xcode 4.6? The crash stack is : Exception Type: SIGSEGV Exception Codes: SEGV_ACCERR at 0xd9f2c061 Crashed Thread: 0 Thread 0 Crashed: 0 libobjc.A.dylib 0x3a74f5aa objc_msgSend + 10 1 Foundation 0x33157599 -[NSNotificationCenter postNotificationName:object:userInfo:] + 73 2 UIKit 0x347830cd -[UIApplication _handleApplicationSuspend:eventInfo:] + 733 3 UIKit 0x346f91e7 -[UIApplication handleEvent:withNewEvent:] + 2459 4 UIKit 0x346f86cd -[UIApplication sendEvent:] + 73 5 UIKit 0x346f811b _UIApplicationHandleEvent + 6155 6 GraphicsServices 0x363ee5a3

NSNotification removeObserver problem

由 假装没事ソ 提交于 2019-12-05 14:24:32
问题 I am either brain damaged or I am lacking of some understending of NSNotificationCenter The problem is that if I create an observer and in the next line will try to delete it like so: [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(removeAllVisibleMapViews) name:@"ClearVisibleMaps" object:nil]; [[NSNotificationCenter defaultCenter] removeObserver:self forKeyPath:@"ClearVisibleMaps"]; I get *** Terminating app due to uncaught exception 'NSRangeException', reason:
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