/根据字体动态获取UILabel高度
//边界矩形的大小(宽,高)
CGFloat lableTitleHight = [lableTitle.text boundingRectWithSize:CGSizeMake(width(imageView.frame),_isMore? height(imageView.frame)/5:MAXFLOAT) options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName:lableTitle.font} context:nil].size.height;
NSLog(@"点击后字体高度:%lf", lableTitleHight);
//边界矩形的大小(宽,高)
CGFloat lableTitleHight = [lableTitle.text boundingRectWithSize:CGSizeMake(width(imageView.frame),_isMore? height(imageView.frame)/5:MAXFLOAT) options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName:lableTitle.font} context:nil].size.height;
NSLog(@"点击后字体高度:%lf", lableTitleHight);