新建一个继承自UIButton的类，在.m文件中重写下面方法
- (id)initWithFrame:(CGRect)frame
{
self= [superinitWithFrame:frame];
if(self)
{
self.titleLabel.textAlignment = NSTextAlignmentCenter;
self.imageView.contentMode = UIViewContentModeCenter;
}
return self;
}
- (CGRect)titleRectForContentRect:(CGRect)contentRect
{
// 文字的最大尺寸
CGSizemaxSize =CGSizeMake(MAXFLOAT, contentRect.size.height);
// 计算文字的高度
CGFloat titleW = [self.currentTitle boundingRectWithSize:maxSize options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName : [UIFont systemFontOfSize:15*ScalePluse]} context:nil].size.width;
CGFloattitleX = (contentRect.size.width-titleW-13)/2.0;
CGFloattitleY =0;
CGFloat titleH = self.frame.size.height;
returnCGRectMake(titleX, titleY, titleW, titleH);
}
- (CGRect)imageRectForContentRect:(CGRect)contentRect
{
//标题的内容
// 文字的最大尺寸
CGSizemaxSize =CGSizeMake(MAXFLOAT, contentRect.size.height);
// 计算文字的高度
CGFloat titleW = [self.currentTitle boundingRectWithSize:maxSize options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName : [UIFont systemFontOfSize:15*ScalePluse]} context:nil].size.width;
CGFloattitleX = (contentRect.size.width-titleW-13)/2.0;
CGFloatimageX = titleW+titleX+3;
CGFloatimageY =0;
CGFloat imageH = self.frame.size.height;
CGFloatimageW =10;
returnCGRectMake(imageX, imageY, imageW, imageH);
}
