iphone – NSTimer崩溃,当我调用[Timer isValid]或[Timer invalidate]

概述我的iPhone应用程序中有两个NSTimers DecreaseTimer工作正常,但是当我调用[timerCountSeconds isValid]或[timerCountSeconds invalidate]时,TimerCountSeconds崩溃.它们是这样使用的： -(id)initialize { //Gets called, when the app launches and wh 我的iPhone应用程序中有两个NSTimers
DecreaseTimer工作正常,但是当我调用[timerCountSeconds isValID]或[timerCountSeconds invalIDate]时,TimerCountSeconds崩溃.它们是这样使用的：

-(ID)initialize { //Gets called,when the app launches and when a UIbutton is pressed if ([timerCountSeconds isValID]) {  [timerCountSeconds invalIDate]; } }- (voID)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { //Gets called,when you begin touching the screen //.... if ([decreaseTimer isValID]) {   [decreaseTimer invalIDate];  } timerCountSeconds = [NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:@selector(runTimer) userInfo:nil repeats:YES]; //....}- (voID)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {//Gets called,when you stop touching the screen(not if you press the UIbutton for -(ID)initialize) //... decreaseTimer = [NSTimer scheduledTimerWithTimeInterval:0.05 target:self selector:@selector(decrease) userInfo:nil repeats:YES]; //...}-(voID)comept3 { //Gets calles when you rubbed the screen a bit    if ([timerCountSeconds isValID]) {    [timerCountSeconds invalIDate];    }}

我做错了什么？
你能帮我么？

解决方法 您将NSTimer对象设置为nil后,将其无效,因为无效方法调用也会发布(根据Apple文档).如果不这样做,就像isValID一样调用方法可能会导致你的崩溃. 总结

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