是否可以在不改变Button背景图像大小的情况下增加UIButton的可拍摄区域
我试过了:
[shareButton setContentEdgeInsets:UIEdgeInsetsMake(top, left, bottom, right)];
&安培;
[shareButton setImageEdgeInsets:UIEdgeInsetsMake(top, left, bottom, right)];
但这些都没有奏效。
有什么建议吗?
答案 0 :(得分:14)
制作buttonWithType:UIButtonTypeCustom
类型的UIButton并为其指定一个较小尺寸的图像。
不要将图像设置为背景图像,否则它会随按钮一起增长。将其设置为主图像。
例如,如果要将可点击区域设置为64x64大小,并且要显示大小为32x32的图像:按钮大小应为64x64,图像大小应为32x32。
编程:
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
// use an image with the desired size (for example 32x32)
[button setImage: [UIImage imageNamed: @"buttonIcon.png"] forState: UIControlStateNormal];
// just set the frame of the button (64x64)
[button setFrame: CGRectMake(xPositionOfMyButton, yPositionOfMyButton, 64, 64)];
Interface Builder:
答案 1 :(得分:3)
对UIButton的超级视图进行子类化,并覆盖hitTest:withEvent:
- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event
{
CGPoint buttonPoint = [self convertPoint:point toView:_button];
if ([_button pointInside:buttonPoint withEvent:event]) { // you may add your requirement here
return _button;
}
return [super hitTest:point withEvent:event];
}
答案 2 :(得分:3)
将您喜欢的设计方法(Interface Builder / Visual Format Language)与Autolayout一起使用,并将UIButton布局为所需的大小。将标题或图像设置为内容,并使用具有可拍摄区域大小的透明图像作为背景图像。
_button = [UIButton buttonWithType:UIButtonTypeCustom];
[_button setImage:[UIImage imageNamed:@"contentImage"] forState:UIControlStateNormal];
[_button setBackgroundImage:[UIImage imageNamed:@"transparentImage"] forState:UIControlStateNormal];
这是_button.layer.borderWidth = 1的示例。