IOS- 自定义 UIButton

#pragma mark init方法内部默认会调用initWithFrame:

- (id)initWithFrame:(CGRect)frame

{

self = [super initWithFrame:frame];

if (self) {

// 里面的图片居中

self.imageView.contentMode = UIViewContentModeCenter;

// 里面的文字居中

self.titleLabel.textAlignment = NSTextAlignmentCenter;

// 文字字体

self.titleLabel.font = [UIFont systemFontOfSize:12];

}

return self;

}

#pragma mark 当按钮达到高亮状态的时候会调用，并且默认会在这个方法中进行高亮处理

- (void)setHighlighted:(BOOL)highlighted { }

#pragma mark 设置内部imageView的frame

- (CGRect)imageRectForContentRect:(CGRect)contentRect

{

CGFloat imgW = contentRect.size.width;

CGFloat imgH = contentRect.size.height * kImageScale;

return CGRectMake(0, 0, imgW, imgH);

}

#pragma mark 设置内部titleLabel的frame

- (CGRect)titleRectForContentRect:(CGRect)contentRect

{

CGFloat titleW = contentRect.size.width;

CGFloat titleY = contentRect.size.height * kImageScale;

CGFloat titleH = contentRect.size.height - titleY;

return CGRectMake(0, titleY, titleW, titleH);

}