label自适应高度

1、自定义方法

+(CGFloat)heightForName:(NSString *)string;

2、实现自定义方法

+ (CGFloat)heightForName:(NSString *)string

{

//宽度和label宽度相同

    CGSize size = CGSizeMake(WIDTH - 120, 300);

    NSDictionary *dic = [NSDictionary dictionaryWithObject:[UIFont systemFontOfSize:11] forKey:NSFontAttributeName];

    CGRect frame = [string boundingRectWithSize:size options:NSStringDrawingUsesLineFragmentOrigin attributes:dic context:nil];

    return frame.size.height;

 }

 3、计算的长度赋值给label

     CGRect nameFrame = self.nameLabel.frame;

    nameFrame.size.height = [[self class] heightForName:self.nameLabel.text];

    self.nameLabel.frame = nameFrame;