ios - 图像视图下带有标题的 UIButton

Question

我想用 imageView 下的标题以编程方式创建一个 UIButton。

按钮大小：170 * 120 图片大小：50 * 50 标题大小：取决于文字。

我知道我必须使用，但我不知道如何：

[_button setTitleEdgeInsets:UIEdgeInsetsMake(0.f, 0.f, 0.f, 0.f)];
[_button setImageEdgeInsets:UIEdgeInsetsMake(0.f, 0.f, 0.f, 0.f)];

我想我应该计算标题的大小，然后使用 EdgeInsets。

谢谢你。

Answer 1

希望这可以帮到你。

@interface UIButton (UIButtonExt)  

- (void)centerImageAndTitle:(float)space;  
- (void)centerImageAndTitle;  

@end  

@implementation UIButton (UIButtonExt)  

- (void)centerImageAndTitle:(float)spacing  
{      
    // get the size of the elements here for readability  
    CGSize imageSize = self.imageView.frame.size;  
    CGSize titleSize = self.titleLabel.frame.size;  

    // get the height they will take up as a unit  
    CGFloat totalHeight = (imageSize.height + titleSize.height + spacing);  

    // raise the image and push it right to center it  
    self.imageEdgeInsets = UIEdgeInsetsMake(- (totalHeight - imageSize.height), 0.0, 0.0, - titleSize.width);  

    // lower the text and push it left to center it  
    self.titleEdgeInsets = UIEdgeInsetsMake(0.0, - imageSize.width, - (totalHeight - titleSize.height),0.0);      
}  

- (void)centerImageAndTitle  
{  
    const int DEFAULT_SPACING = 6.0f;  
    [self centerImageAndTitle:DEFAULT_SPACING];  
}  

@end   

Answer 2

最终稳定的解决方案是使用框架，而不是EdgeInset这样的解决方案：

@interface UIButton (UIButtonExt)
(void)centerImageAndTitleEx;
@end

@implementation UIButton (UIButtonExt)

(void)centerImageAndTitleEx
{
CGRect frame = self.imageView.frame;

frame = CGRectMake(truncf((self.bounds.size.width - frame.size.width) / 2), 10.0f, frame.size.width, frame.size.height);

self.imageView.frame = frame;

frame = self.titleLabel.frame;

frame = CGRectMake(truncf((self.bounds.size.width - frame.size.width) / 2), self.bounds.size.height - frame.size.height - 5.0, frame.size.width, frame.size.height);

self.titleLabel.frame = frame;
}

@end