Iphone 如何通过调用imageView上的touchEvent来获取UIimageView中的图像像素？

我想在imageView上调用touchEvent。在触摸imageView时，我想获得图像的像素。我正在使用此选项：-

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *touch = [[event allTouches] anyObject];
[sampleImage setBackgroundColor:[UIColor redColor]];
//CGPoint location = [touch locationInView:self.view];
if ([touch view] == sampleImage) 
{

    url1 = [NSURL fileURLWithPath:[NSString stringWithFormat:@"%@/Na.wav", [[NSBundle mainBundle] resourcePath]]];
    [sampleImage setBackgroundColor:[UIColor colorWithRed:10.0/255.0 green:10.0/255.0 blue:10.0/255.0 alpha:1.0]];
}
NSError *error;
audio = [[AVAudioPlayer alloc] initWithContentsOfURL:url1 error:&error];
audio.numberOfLoops = 0;
[audio play];
[sampleImage setBackgroundColor:[UIColor redColor]];   
}

有可能吗？如果有，请帮忙。

---

提前感谢。

您可以使用

UITapgestureRecognitizer

并将

目标设置为您的
图像视图
：

您应该在图像视图中添加一个手势识别器，让学员为您处理播放的声音

在viewDidLoad中，可以实现以下功能：

UITapGestureRecognizer* tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapGesture:)];
    tap.numberOfTapsRequired = 1;
    [YourImageView addGestureRecognizer:tap];
    [tap release];

- (void) touchesMoved:(NSSet *)touches withEvent:(UIEvent *) event {
        UITouch *touch = [[event allTouches] anyObject];
            CGPoint location = [touch locationInView:self.view];
        if ([touch view] == YourImageView) {
        //play the sound
        NSString *path = [[NSBundle mainBundle] pathForResource:@"YourSound" ofType:@"mp3"];

            AVAudioPlayer * theAudio = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
            theAudio.delegate = self;
            [theAudio play];
            [theAudio release];

        }
    }

在代码中，您可以将代理和声音放在如下位置：

- (void)tapGesture:(UIGestureRecognizer*)sender {
NSString *path = [[NSBundle mainBundle] pathForResource:@"YourSound" ofType:@"mp3"];

    AVAudioPlayer * theAudio = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
    theAudio.delegate = self;
    [theAudio play];
    [theAudio release];
}

好了

编辑：


要在触摸屏上使用上述选项，请执行以下操作：

UITapGestureRecognizer* tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapGesture:)];
    tap.numberOfTapsRequired = 1;
    [YourImageView addGestureRecognizer:tap];
    [tap release];

- (void) touchesMoved:(NSSet *)touches withEvent:(UIEvent *) event {
        UITouch *touch = [[event allTouches] anyObject];
            CGPoint location = [touch locationInView:self.view];
        if ([touch view] == YourImageView) {
        //play the sound
        NSString *path = [[NSBundle mainBundle] pathForResource:@"YourSound" ofType:@"mp3"];

            AVAudioPlayer * theAudio = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
            theAudio.delegate = self;
            [theAudio play];
            [theAudio release];

        }
    }

好了：）
请参见
userInteractionEnabled
property我可以使用这个方法吗？（void）touchesbeated:（NSSet*）toucheevent:（UIEvent*）event？？？当然可以，我将编辑我的答案。BarryK88:-你能告诉我为什么我的这个问题被关闭了吗？因为我是iphone新手，请帮助我？？你应该阅读stackoverflow的FAQ->我可以使用这个方法吗？（无效）触摸开始：（NSSet*）触摸事件：（UIEvent*）事件？？？？