Xcode 删除触摸事件图像？
我正在使用此代码在屏幕上显示随机图像。
- (void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [[event allTouches] anyObject];
CGPoint location = [touch locationInView:touch.view];
UIImageView *cloud = [[UIImageView alloc]
initWithImage:[UIImage imageNamed:@"spit.png"]];
cloud.center = CGPointMake(random() % 250, random() % 400); //Random place
[cloud setAlpha:1];
[self.view addSubview:cloud];
[cloud release];
cloud.frame = CGRectMake(0, 0, 300, 300);
[UIView beginAnimations: @"cloddy" context: nil];
[UIView setAnimationDuration: 0.5f];
[UIView setAnimationCurve: UIViewAnimationCurveEaseIn];
// Size when done
cloud.frame = CGRectMake(0, 0, 75, 75);
cloud.center = location;
[UIView commitAnimations];
}
触摸几次后，屏幕会变得有点满。如何在另一个 IBAction 中删除它们？为什么即使我使用随机，动画总是从左上角开始？
I'm using this code to display random images on the screen.
- (void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [[event allTouches] anyObject];
CGPoint location = [touch locationInView:touch.view];
UIImageView *cloud = [[UIImageView alloc]
initWithImage:[UIImage imageNamed:@"spit.png"]];
cloud.center = CGPointMake(random() % 250, random() % 400); //Random place
[cloud setAlpha:1];
[self.view addSubview:cloud];
[cloud release];
cloud.frame = CGRectMake(0, 0, 300, 300);
[UIView beginAnimations: @"cloddy" context: nil];
[UIView setAnimationDuration: 0.5f];
[UIView setAnimationCurve: UIViewAnimationCurveEaseIn];
// Size when done
cloud.frame = CGRectMake(0, 0, 75, 75);
cloud.center = location;
[UIView commitAnimations];
}
after a couple of touches the screen gets kinda full. How do I remove them inside another IBAction? And why does the animation always start in the upper left corner even though I'm using random?
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假设已添加到视图中的唯一子视图是
clouds，云始终从左上角开始，因为这一行：
cloud.frame = CGRectMake(0, 0, 300, 300);将其原点重置为 0,0。将cloud.center = CGPointMake(random() % 250, random() % 400);移到您设置云框架的行下方，您应该已准备就绪。Assuming that the only subviews that have been added to your view are
clouds,The cloud is always starting at the upper left because this line:
cloud.frame = CGRectMake(0, 0, 300, 300);resets its origin to 0,0. Movecloud.center = CGPointMake(random() % 250, random() % 400);below the line where you set the cloud's frame and you should be all set.