Xcode 如何为iPhone创建闪烁的录制按钮

我看过好几篇文章，包括[这篇]。这正是我想做的，但我无法让它发挥作用

我想向用户显示，他们已经按下了录制按钮，他们需要再次按下该按钮才能停止录制

到目前为止，开始录制方法的代码如下所示：

NSLog(@"DetailVC - recordAudio -  soundFilePath is %@", soundFile);
        [audioRecorder prepareToRecord];
        recording = YES;
        NSLog(@"start recording");
        NSLog(@"1");
        //[autoCog startAnimating];

        [audioRecorder recordForDuration:120];
        recording = NO;

        //Start a timer to animate the record images
        if (recording == YES) {
        toggle = FALSE;
        timer = [NSTimer scheduledTimerWithTimeInterval: 2.0
                                                          target: self
                                                        selector: @selector(toggleButtonImage:)
                                                        userInfo: nil
                                                         repeats: YES];  


        //UIImage *changeImage = [UIImage imageNamed:stopButtonFile];       
        //[recordButton setImage:changeImage forState:UIControlStateNormal];        


        //[timer invalidate];
        //timer = nil;

        NSLog(@"2");

        }

- (void)toggleButtonImage:(NSTimer*)timer
{
   NSLog(@"%s", __FUNCTION__);
    if(toggle)
    {
        NSLog(@"1");
        /*
        [UIView beginAnimations];
        recordButton.opacity = 0.0;
        [recordButton setAnimationDuration: 1.5];
        [recordButton commitAnimations];
        [recordButton setImage:[UIImage imageNamed:@"record.png"] forState: UIControlStateNormal];
         */
        CGContextRef context = UIGraphicsGetCurrentContext();
        [UIView beginAnimations:nil context:context];
        [UIView setAnimationCurve:UIViewAnimationCurveEaseIn]; //delete "EaseOut", then push ESC to check out other animation styles
        [UIView setAnimationDuration: 0.5];//how long the animation will take
        [UIView setAnimationDelegate: self];
        recordButton.alpha = 1.0; //1.0 to make it visible or 0.0 to make it invisible
        [UIView commitAnimations];
    }
    else 
    {
         NSLog(@"2");
        CGContextRef context = UIGraphicsGetCurrentContext();
        [UIView beginAnimations:nil context:context];
        [UIView setAnimationCurve:UIViewAnimationCurveEaseOut]; //delete "EaseOut", then push ESC to check out other animation styles
        [UIView setAnimationDuration: 0.5];//how long the animation will take
        [UIView setAnimationDelegate: self];
        recordButton.alpha = 0.0; //1.0 to make it visible or 0.0 to make it invisible
        [UIView commitAnimations];
        //[recordButton setImage:[UIImage imageNamed:@"stopGrey.png"] forState: UIControlStateNormal];
    }
    toggle = !toggle;
}

- (IBAction)record:(id)sender {
    self.recording = !self.recording;

    if (!self.recording) {
        [UIView animateWithDuration:0.1 
                              delay:0.0 
                            options:UIViewAnimationOptionCurveEaseInOut | UIViewAnimationOptionBeginFromCurrentState
                     animations:^{
                         self.recordButton.alpha = 1.0f;
                     } 
                     completion:^(BOOL finished){
                     }];
    } else {
        self.recordButton.alpha = 1.0f;
        [UIView animateWithDuration:0.5 
                              delay:0.0 
                            options:UIViewAnimationOptionCurveEaseInOut | UIViewAnimationOptionRepeat | UIViewAnimationOptionAutoreverse | UIViewAnimationOptionAllowUserInteraction 
                         animations:^{
                             self.recordButton.alpha = 0.0f;
                         } 
                         completion:^(BOOL finished){
                         }];
    }
}

toggleButton方法如下所示：

NSLog(@"DetailVC - recordAudio -  soundFilePath is %@", soundFile);
        [audioRecorder prepareToRecord];
        recording = YES;
        NSLog(@"start recording");
        NSLog(@"1");
        //[autoCog startAnimating];

        [audioRecorder recordForDuration:120];
        recording = NO;

        //Start a timer to animate the record images
        if (recording == YES) {
        toggle = FALSE;
        timer = [NSTimer scheduledTimerWithTimeInterval: 2.0
                                                          target: self
                                                        selector: @selector(toggleButtonImage:)
                                                        userInfo: nil
                                                         repeats: YES];  


        //UIImage *changeImage = [UIImage imageNamed:stopButtonFile];       
        //[recordButton setImage:changeImage forState:UIControlStateNormal];        


        //[timer invalidate];
        //timer = nil;

        NSLog(@"2");

        }

- (void)toggleButtonImage:(NSTimer*)timer
{
   NSLog(@"%s", __FUNCTION__);
    if(toggle)
    {
        NSLog(@"1");
        /*
        [UIView beginAnimations];
        recordButton.opacity = 0.0;
        [recordButton setAnimationDuration: 1.5];
        [recordButton commitAnimations];
        [recordButton setImage:[UIImage imageNamed:@"record.png"] forState: UIControlStateNormal];
         */
        CGContextRef context = UIGraphicsGetCurrentContext();
        [UIView beginAnimations:nil context:context];
        [UIView setAnimationCurve:UIViewAnimationCurveEaseIn]; //delete "EaseOut", then push ESC to check out other animation styles
        [UIView setAnimationDuration: 0.5];//how long the animation will take
        [UIView setAnimationDelegate: self];
        recordButton.alpha = 1.0; //1.0 to make it visible or 0.0 to make it invisible
        [UIView commitAnimations];
    }
    else 
    {
         NSLog(@"2");
        CGContextRef context = UIGraphicsGetCurrentContext();
        [UIView beginAnimations:nil context:context];
        [UIView setAnimationCurve:UIViewAnimationCurveEaseOut]; //delete "EaseOut", then push ESC to check out other animation styles
        [UIView setAnimationDuration: 0.5];//how long the animation will take
        [UIView setAnimationDelegate: self];
        recordButton.alpha = 0.0; //1.0 to make it visible or 0.0 to make it invisible
        [UIView commitAnimations];
        //[recordButton setImage:[UIImage imageNamed:@"stopGrey.png"] forState: UIControlStateNormal];
    }
    toggle = !toggle;
}

- (IBAction)record:(id)sender {
    self.recording = !self.recording;

    if (!self.recording) {
        [UIView animateWithDuration:0.1 
                              delay:0.0 
                            options:UIViewAnimationOptionCurveEaseInOut | UIViewAnimationOptionBeginFromCurrentState
                     animations:^{
                         self.recordButton.alpha = 1.0f;
                     } 
                     completion:^(BOOL finished){
                     }];
    } else {
        self.recordButton.alpha = 1.0f;
        [UIView animateWithDuration:0.5 
                              delay:0.0 
                            options:UIViewAnimationOptionCurveEaseInOut | UIViewAnimationOptionRepeat | UIViewAnimationOptionAutoreverse | UIViewAnimationOptionAllowUserInteraction 
                         animations:^{
                             self.recordButton.alpha = 0.0f;
                         } 
                         completion:^(BOOL finished){
                         }];
    }
}

我可以看到显示循环正在迭代的日志，但是：

图像不会切换，并且 该操作未与记录方法并行运行。 如果您有任何关于如何进行的想法，我将不胜感激。

试试以下方法：

- (IBAction)record:(id)sender 
{
    self.recording = !self.recording;

    [self toggleButton];
}

- (void) toggleButton
{
    if (!self.recording) {
        self.recordButton.alpha = 1.0;
        return;
    }

    [UIView animateWithDuration: 0.5 
                          delay: 0.0 
                        options: UIViewAnimationOptionCurveEaseInOut | UIViewAnimationOptionAllowUserInteraction 
                     animations:^{
                         self.recordButton.alpha = !self.recordButton.alpha;
                     } 
                     completion:^(BOOL finished) {
                         [self toggleButton];
                     }];

}

---

根据Ashley的回答，我会选择更像这样的答案：

NSLog(@"DetailVC - recordAudio -  soundFilePath is %@", soundFile);
        [audioRecorder prepareToRecord];
        recording = YES;
        NSLog(@"start recording");
        NSLog(@"1");
        //[autoCog startAnimating];

        [audioRecorder recordForDuration:120];
        recording = NO;

        //Start a timer to animate the record images
        if (recording == YES) {
        toggle = FALSE;
        timer = [NSTimer scheduledTimerWithTimeInterval: 2.0
                                                          target: self
                                                        selector: @selector(toggleButtonImage:)
                                                        userInfo: nil
                                                         repeats: YES];  


        //UIImage *changeImage = [UIImage imageNamed:stopButtonFile];       
        //[recordButton setImage:changeImage forState:UIControlStateNormal];        


        //[timer invalidate];
        //timer = nil;

        NSLog(@"2");

        }

- (void)toggleButtonImage:(NSTimer*)timer
{
   NSLog(@"%s", __FUNCTION__);
    if(toggle)
    {
        NSLog(@"1");
        /*
        [UIView beginAnimations];
        recordButton.opacity = 0.0;
        [recordButton setAnimationDuration: 1.5];
        [recordButton commitAnimations];
        [recordButton setImage:[UIImage imageNamed:@"record.png"] forState: UIControlStateNormal];
         */
        CGContextRef context = UIGraphicsGetCurrentContext();
        [UIView beginAnimations:nil context:context];
        [UIView setAnimationCurve:UIViewAnimationCurveEaseIn]; //delete "EaseOut", then push ESC to check out other animation styles
        [UIView setAnimationDuration: 0.5];//how long the animation will take
        [UIView setAnimationDelegate: self];
        recordButton.alpha = 1.0; //1.0 to make it visible or 0.0 to make it invisible
        [UIView commitAnimations];
    }
    else 
    {
         NSLog(@"2");
        CGContextRef context = UIGraphicsGetCurrentContext();
        [UIView beginAnimations:nil context:context];
        [UIView setAnimationCurve:UIViewAnimationCurveEaseOut]; //delete "EaseOut", then push ESC to check out other animation styles
        [UIView setAnimationDuration: 0.5];//how long the animation will take
        [UIView setAnimationDelegate: self];
        recordButton.alpha = 0.0; //1.0 to make it visible or 0.0 to make it invisible
        [UIView commitAnimations];
        //[recordButton setImage:[UIImage imageNamed:@"stopGrey.png"] forState: UIControlStateNormal];
    }
    toggle = !toggle;
}

- (IBAction)record:(id)sender {
    self.recording = !self.recording;

    if (!self.recording) {
        [UIView animateWithDuration:0.1 
                              delay:0.0 
                            options:UIViewAnimationOptionCurveEaseInOut | UIViewAnimationOptionBeginFromCurrentState
                     animations:^{
                         self.recordButton.alpha = 1.0f;
                     } 
                     completion:^(BOOL finished){
                     }];
    } else {
        self.recordButton.alpha = 1.0f;
        [UIView animateWithDuration:0.5 
                              delay:0.0 
                            options:UIViewAnimationOptionCurveEaseInOut | UIViewAnimationOptionRepeat | UIViewAnimationOptionAutoreverse | UIViewAnimationOptionAllowUserInteraction 
                         animations:^{
                             self.recordButton.alpha = 0.0f;
                         } 
                         completion:^(BOOL finished){
                         }];
    }
}

---

谢谢Ashley，你的代码看起来很酷，但我一定是做错了什么，因为它不适合我+1不过，我喜欢你用积木，当我弄明白我搞砸了什么，我会用你的片段。谢谢，马特。这对我有用！但是请注意，当alpha值小于0.02时，将忽略所有触摸事件。检查这个问题和我对它的评论@学生：对。如果需要触摸按钮，可以将alpha值保持在大于0.1的值。不会在视觉上造成太大的差异。