检测对 Xcode 中某个对象的触摸
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Detect a touch on a certain object in Xcode
提问by DAS
What's the Xcode code for this pseudocode?
这个伪代码的 Xcode 代码是什么？
if ([Any UIPickerView in my ViewController isTouched]) {
[AnyUIView setHidden:NO];
}
if ([Any UIPickerView in my ViewController is__NOT__Touched__Anymore__]) {
[AnyUIView setHidden:YES];
}
Tried it with the -(void)touchesBeganmethod, it detects the touches but I was not able to make it object-specific. Thanks
使用该-(void)touchesBegan方法进行了尝试，它会检测到触摸，但我无法使其特定于对象。谢谢
P.S. I want to display a hint on the display while the UIPickerViewis touched.
PS我想在UIPickerView触摸时在显示屏上显示提示。
回答by bandejapaisa
This is just from the top of my head...... but you should be able to get the idea...
这只是从我的头顶......但你应该能够得到这个想法......
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
[super touchesBegan:touches withEvent:event];
UITouch *touch = [touches anyObject];
if ([touch.view isKindOfClass: UIPickerView.class]) {
//your touch was in a uipickerview ... do whatever you have to do
}
}
..and do the same with touchesEnded:withEvent:
..并做同样的事情 touchesEnded:withEvent:
