文本随着宽度而改变frame

UILabel *_nickname = [[UILabel alloc]init];

//_accountHome 是model 对象

NSString *nickStr = _accountHome.user_name ? _accountHome.user_name :@"去玩吗";

_nickname.text = [NSString stringWithFormat:@"  %@  ",nickStr];

// 文本的宽度（随着文本字数而改变）

NSDictionary *attrs = @{NSFontAttributeName : [UIFont boldSystemFontOfSize:14]};

CGSize size=[_nickname.text sizeWithAttributes:attrs];

float nickWidth = size.width;//LTWPercentage(150);

if (nickWidth > LTWidth - LTWPercentage(80)) {// 给宽度一个最大限定值

nickWidth = LTWidth - LTWPercentage(80);

}

_nickname.frame = CGRectMake((LTWidth - nickWidth)/2 ,CGRectGetMaxY(photoImg.frame) + LTPercentage(10), nickWidth, LTPercentage(30));

_nickname.layer.borderWidth = 1;

[self.homeHeaderView addSubview:_nickname];