nstimer

So I am trying to make a game where the user must scroll down as fast as they can in order to escape a "block" that grows infinitely bigger. Here is my problem: I am using a UI ScrollView as my mechanism for scrolling with a normal UI View as a subview. I have a time set to fire every 0.005 seconds that increases the height of both the "block" and the content height of the scroll view (so that the user can technically scroll infinitely). The problem is that whenever the user begins to scroll, this stops firing (i.e. the block stops getting taller). However, immediately when the user stops

基本介绍 线程安全的MSWeakTimer是NSTimer的替代品，最基本的特点是它不会 retain target 以及支持GCD queues。 问题的提出 关于 NSTimer 中 target 的生命周期问题， 啸笑天 同学在他的 博客 中说的很清楚了。 当 repeat 为 YES 时 NSTimer 会 retains 它的 target，那么target的生命周期就成了问题，完全的交给了这个timer，只有 当timer 调用invalidate后 dealloc 才有机会发生 。 另一个问题是GCD，在苹果的官方文档 中说的很清楚: Special Considerations You must send this message from the thread on which the timer was installed. If you send this message from another thread, the input source associated with the timer may not be removed from its run loop, which could prevent the thread from exiting properly. invalidate必须由安装这个timer的线程发起

Ive figured out how to make a timer in a single-view application, but not Spritekit. When I use the following code, I get 2 errors(listed below). Can anyone help me out with this? Thanks, Jack. The timer. if(!_scorelabel) { _scorelabel = [SKLabelNode labelNodeWithFontNamed:@"Courier-Bold"]; _scorelabel.fontSize = 200; _scorelabel.position = CGPointMake(CGRectGetMidX(self.frame), CGRectGetMidY(self.frame)); _scorelabel.fontColor = [SKColor colorWithHue: 0 saturation: 0 brightness: 1 alpha: .5]; [self addChild:_scorelabel]; } _scorelabel = [NSTimer scheduledTimerWithTimeInterval: 1 target:self

Without creating multiple NSTimer instances, how would one achieve an NSTimer to fire a specific or multiple method with different intervals in a sequence. For example method1 (0.3 sec), method2 (0.5), method3 (0.7) and so on. I would appreciate if someone could please share any example code. holex I'm not sure what your final goal is with this but after reading your question I would recommend to try the following way , maybe this is what you'd look for. you should put this code where you normally wanted to start the same NSTimer class with different intervals (what is not possible,

I would like to build a few simple countdown timers in a UITableview. I noticed the World Clock app has animated clocks in each of it's rows. What is the best method to firing an NSTimer to update each table row? Can a single timer be run that updates all cells or should I have a custom view subclass with built in timer that is added to each row? I am just trying to get a proper course of action. One timer is sufficient. When it fires, ask the table view for the visible cells and update them one by one. You could also just call reloadData when the timer fires but depending on how you draw your

I am banging my head against an odd error after a move to 10.12/Sierra and Xcode 8.1: +[NSTimer scheduledTimerWithTimeInterval:repeats:block:]: unrecognized selector sent to class 0x7fff78f1fa88 The most minimal code (default settings of create a new project) to reproduce this is: // AppDelegate.m // #import "AppDelegate.h" @interface AppDelegate () @property (weak) IBOutlet NSWindow *window; @property (strong, nonatomic) NSTimer * timer; @end @implementation AppDelegate - (void)applicationDidFinishLaunching:(NSNotification *)aNotification { self.timer = [NSTimer scheduledTimerWithTimeInterval

How do I go about this task? Basically, I will have an array of "seconds int" listed inside the UITableView. So how can I assign each "seconds int" to countdown to zero? The possible problems I'm seeing is the timers not being updated when the cell is not yet created. And how do I instantiate multiple independent NSTimers updating different ui elements? I'm quite lost here, so any suggestions is greatly appreciated. for visual purposes, I want to have something like this: From the image, it looks like your model is a set of actions the user plans to take. I would arrange things this way: 1)