Question

我想知道如何让图像显示在用户触摸的位置。我有一个与IBAction相关联的UIButton，当用户点击按钮时，我希望图像出现在触摸的x，y处。

任何人都有任何指示？谢谢！

Answer 1

为什么使用UI按钮在触摸位置添加图像？

以下代码是在视图的触摸位置添加图像。试试这个（别忘了在.h文件中添加委托）

       - (void)viewDidLoad
{
//code for adding touch recognizer for UIview. 
    UITapGestureRecognizer *singleFingerTap =
    [[UITapGestureRecognizer alloc] initWithTarget:self
                                            action:@selector(handleSingleTap:)];
    [self.view addGestureRecognizer:singleFingerTap];



    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
}

//The event handling method
- (void)handleSingleTap:(UITapGestureRecognizer *)recognizer {
    CGPoint location = [recognizer locationInView:self.view];

    UIImageView *imageview = [[UIImageView alloc] initWithFrame:CGRectMake(location.x-imagewidth/2,location.y-imageheight/2,imagewidth,imageheight)];
    imageview.image = [UIImage imageNamed:@"imagename.png"];
    [self.view addSubview:imageview];
}

图像出现在触摸位置？

1 个答案: