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问题描述
将图像视图的userInteractionEnabled属性设置为YES-这样它将接收触摸事件 向其中添加UITapGestureRecongnizer set image view's userInteractionEnabled property to YES - so it will receive touch events
add UITapGestureRecongnizer to it
我有一个带png的ImageView，我想这样做:当有人触摸此imageview时，其alpha更改为0.0，这可能吗?(全部不带按钮)
I have an ImageView with a png and I want to do this: when someone touch this imageview it's alpha change to 0.0, is it possible? (all without buttons)
推荐答案是的，有可能.例如，您可以按照以下步骤进行操作:
Yes, it is possible. For example you can do that with following steps:
在手势处理程序中将视图的Alpha设置为0.0，您也可以使用动画来做到这一点:
in gesture handler set view's alpha to 0.0, you can do that with animation as well: [UIView animateWithDuration:0.5 animations:^(void){ imageView.alpha = 0.0f; }];
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iOS:触摸Imageview时发生的事件
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