Iphone 第一次运行计时器，第二次恢复计时器

m文件中声明的变量

BOOL isFirstTime;

我希望如果第一次按下播放按钮，它应该切换到暂停按钮并检查功能

isFirstTime

，然后它应该启动计时器并执行

displayviewsAction

方法，如果暂停按钮恢复播放，那么它应该再次检查功能

isFirstTime

或第二次，如果是第二次点击，则应恢复定时器

-(void)playpauseAction:(id)sender {
if ([audioPlayer isPlaying]){         
   [sender setImage:[UIImage imageNamed:@"Play Icon.png"] forState:UIControlStateSelected];
   [audioPlayer pause];
   [self pauseTimer];
} else {
  [sender setImage:[UIImage imageNamed:@"pause.png"] forState:UIControlStateNormal];
  [audioPlayer play];
  [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(AfterOneSecondsFuction) userInfo:nil repeats:YES];
        }         
}
-(void)pauseTimer{
pauseStart = [[NSDate dateWithTimeIntervalSinceNow:0] retain];
previousFireDate = [[timer fireDate] retain];
[timer setFireDate:[NSDate distantFuture]];
}
 -(void)resumeTimer{
float pauseTime = -1*[pauseStart timeIntervalSinceNow];
[timer setFireDate:[previousFireDate initWithTimeInterval:pauseTime sinceDate:previousFireDate]];
[pauseStart release];
[previousFireDate release];    
}
-(void)AfterOneSecondsFuction
{
if(!isFirstTime)
{
 isFirstTime=YES;
 return;
 self.timer = [NSTimer scheduledTimerWithTimeInterval:11.0
                                                  target:self
                                                selector:@selector(displayviewsAction:)
                                                userInfo:nil
                                                repeats:NO];

} else if (!isFirstTime){
  isFirstTime=NO;
  return;
  [self resumeTimer]; 

     }
}    

- (void)displayviewsAction:(id)sender
{  
  First *firstController = [[First alloc] init];
firstController.view.frame = CGRectMake(0, 0, 320, 480);
CATransition *transitionAnimation = [CATransition animation];   
[transitionAnimation setDuration:1];
[transitionAnimation setType:kCATransitionFade];
[transitionAnimation setTimingFunction:[CAMediaTimingFunction     functionWithName:kCAMediaTimingFunctionEaseIn]];
[self.view.layer addAnimation:transitionAnimation forKey:kCATransitionFade];
[self.view addSubview:firstController.view];
[self.view addSubview:toolbar];
[firstController release];   
}

-(void)Second 
{
 Second *secondController = [[Second alloc] init];
secondController.view.frame = CGRectMake(0, 0, 320, 480);
CATransition *transitionAnimation = [CATransition animation];
[transitionAnimation setDuration:1];
[transitionAnimation setType:kCATransitionReveal];
[transitionAnimation setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseIn]];
[self.view.layer addAnimation:transitionAnimation forKey:kCATransitionReveal];
[self.view addSubview:secondController.view]; 
[self.view addSubview:toolbar];
[secondController release];
self.timer = [NSTimer scheduledTimerWithTimeInterval:27 target:self selector:@selector(Third) userInfo:nil repeats:NO];
 }

看起来当第一次按下play时，它只是切换到暂停按钮，没有检查功能

isFirstTime

或否，也没有启动计时器并执行displayviewsaction

如果有人能告诉我为什么没有发生，我做错了什么

---

谢谢您的帮助。

我想说的是，您有一个播放按钮，按下时会切换到“暂停”按钮，播放音频文件，启动计时器，并开始以不同的时间间隔逐个加载视图控制器。现在，按下“暂停”按钮时，应该暂停计时器，以便视图控制器不会加载此外，当再次按下“暂停”按钮以继续时，它应恢复计时器并从该点开始加载视图控制器。好的，很酷，假设您只是询问如何实现该按钮，而不是视图控制器的切换方式，我已更新了答案；顺便说一句，我不确定你所说的“函数isFirstTime”是什么意思，你没有方法isFirstTime，因为你没有引用它，你是说BOOL isFirstTime，因为它是指针/iVar，不是方法。是的，它是BOOL isFirstTime作为一个变量，我以前没有使用过BOOL，以及如何将它设置为YESA BOOL，或boolean，是最原始的数据类型，为1或0表示是/否或真/假，这是iOS中的宏。所以，要回答您的问题，您所要做的就是

isFirstTime=YES

。

BOOL isFirstTime

//Somewhere where the object is set up, isFirstTime should be set to YES


- (void)playpauseAction:(id)sender {

//When the button is pressed

if(isFirstTime) {

//Load the sound file
//Start playing the sound
//Start view controller timers
//Change the button image to paused
isFirstTime = FALSE;

}

else {

//The button has already been pressed

if ([audioPlayer isPlaying]) {

//If the sound is playing

//Stop playing the sound
//Stop view controller timers
//Change the button image to playing

}

else {

//Resume playing the sound
//Start view controller timers
//Change the button image to paused

}

}


}