UIButton 中图像下的标签 [英] Label under image in UIButton
本文介绍了UIButton 中图像下的标签的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我正在尝试创建一个按钮,该按钮在图标下方有一些文本(有点像应用程序按钮),但似乎很难实现.任何想法如何让文本显示下面带有UIButton
的图像?
I'm trying to create a button which has some text beneath the icon (sorta like the app buttons) however it seems to be quite difficult to achieve. Any ideas how can I go about get the text to display below the image with a UIButton
?
推荐答案
或者你可以直接使用这个类别:
Or you can just use this category:
@interface UIButton (VerticalLayout)
- (void)centerVerticallyWithPadding:(float)padding;
- (void)centerVertically;
@end
@implementation UIButton (VerticalLayout)
- (void)centerVerticallyWithPadding:(float)padding {
CGSize imageSize = self.imageView.frame.size;
CGSize titleSize = self.titleLabel.frame.size;
CGFloat totalHeight = (imageSize.height + titleSize.height + padding);
self.imageEdgeInsets = UIEdgeInsetsMake(- (totalHeight - imageSize.height),
0.0f,
0.0f,
- titleSize.width);
self.titleEdgeInsets = UIEdgeInsetsMake(0.0f,
- imageSize.width,
- (totalHeight - titleSize.height),
0.0f);
self.contentEdgeInsets = UIEdgeInsetsMake(0.0f,
0.0f,
titleSize.height,
0.0f);
}
- (void)centerVertically {
const CGFloat kDefaultPadding = 6.0f;
[self centerVerticallyWithPadding:kDefaultPadding];
}
@end
Swift 扩展
extension UIButton {
func centerVertically(padding: CGFloat = 6.0) {
guard
let imageViewSize = self.imageView?.frame.size,
let titleLabelSize = self.titleLabel?.frame.size else {
return
}
let totalHeight = imageViewSize.height + titleLabelSize.height + padding
self.imageEdgeInsets = UIEdgeInsets(
top: -(totalHeight - imageViewSize.height),
left: 0.0,
bottom: 0.0,
right: -titleLabelSize.width
)
self.titleEdgeInsets = UIEdgeInsets(
top: 0.0,
left: -imageViewSize.width,
bottom: -(totalHeight - titleLabelSize.height),
right: 0.0
)
self.contentEdgeInsets = UIEdgeInsets(
top: 0.0,
left: 0.0,
bottom: titleLabelSize.height,
right: 0.0
)
}
}
建议:如果按钮高度小于 totalHeight
,则图像将绘制在边框外.
Suggestion:
If button height is less than totalHeight
, then image will draw outside borders.
imageEdgeInset.top
应该是:
max(0, -(totalHeight - imageViewSize.height))
这篇关于UIButton 中图像下的标签的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
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