iOS的Label自适应高度和宽度

/***

**自适应高度和宽度，其中参数widget是你要改变的label,size是定义label的长宽最大值,sizefont这个是字体的大小

***/

+(CGRect )xyAutoSizeOfWidget:(UILabel *)widget andSize:(CGSize)size andtextFont:(CGFloat )sizefont

{

widget.numberOfLines = 0;

CGRect rect = widget.frame;

NSDictionary * tdic = [NSDictionary dictionaryWithObjectsAndKeys:[UIFont systemFontOfSize:sizefont],NSFontAttributeName,nil];

CGSize  actualsize =[widget.text boundingRectWithSize:size options:NSStringDrawingUsesLineFragmentOrigin  attributes:tdic context:nil].size;

CGRect tmpRect = CGRectMake(rect.origin.x, rect.origin.y, actualsize.width, actualsize.height);

return tmpRect;

}