我想在某个视图中的随机位置创建一个按钮.我搜索并阅读了一些SO主题但是我找不到解决问题的方法.
这是我的代码:
UIButton *button1 = [UIButton buttonWithType:UIButtonTypeCustom];
CGRect buttonRect = button1.frame;
buttonRect.size = CGSizeMake(100, 100);
button1.frame = buttonRect;
[self.arr addObject:button1];
int r = ([button1 frame].size.width)/2;
int x = r + (arc4random() % (self.view.frame.size.width - button1.frame.size.width));
int y = r + (arc4random() % (self.view.frame.size.height - button1.frame.size.height));
//ERROR:Invalid operands to binary expression ('float' and 'float')
[button1 setCenter:CGPointMake(x, y)];