ios - UIButton 填充

Question

UIButton 是否有等效的填充，就像在 CSS 中一样？

我似乎对小按钮有疑问，所以我想扩大按钮的大小，以便于点击。

我围绕代码做了一个工作来调整 UIButton 的大小并让内容保持原样:

- (void)adjustButtonView:(UIButton *)button toSize:(CGSize)size
{
    CGRect previousFrame = button.frame;
    CGRect newFrame = button.frame;
    newFrame.size = size;
    CGFloat adjustX = (size.width - previousFrame.size.width)/2;
    CGFloat adjustY = (size.height - previousFrame.size.height)/2;
    newFrame.origin.x = previousFrame.origin.x - adjustX;
    newFrame.origin.y = previousFrame.origin.y - adjustY;
    button.frame = newFrame;

    UIEdgeInsets edgeInsets = UIEdgeInsetsMake(adjustY, adjustX, adjustY, adjustX);
    button.contentEdgeInsets = edgeInsets;
}

我只是想知道是否有更简单的方法来扩展 UIButton。

Answer 1

我认为没有比您所做的更简单的方法了。但是我们可以通过将方法移至 UIButton 类别来改进您的代码。

UIButton+Resize.h

@interface UIButton (Resize)

- (void)adjustToSize:(CGSize)size;

@end

UIButton+Resize.m

@implementation UIButton (Resize)

- (void)adjustToSize:(CGSize)size
{
    CGRect previousFrame = self.frame;
    CGRect newFrame = self.frame;
    newFrame.size = size;
    CGFloat adjustX = (size.width - previousFrame.size.width)/2;
    CGFloat adjustY = (size.height - previousFrame.size.height)/2;
    newFrame.origin.x = previousFrame.origin.x - adjustX;
    newFrame.origin.y = previousFrame.origin.y - adjustY;
    self.frame = newFrame;

    UIEdgeInsets edgeInsets = UIEdgeInsetsMake(adjustY, adjustX, adjustY, adjustX);
    self.contentEdgeInsets = edgeInsets;
}

@end