ios 富文本不能解决的事情

1. 先说一下大众需求，如图

1.1富文本设置不同字号

此种需求利用label的富文本设置一下不同字号就ok，代码如下

UILabel * label = [[UILabel alloc] initWithFrame:CGRectMake(20, 30, 300, 80)];  
label.backgroundColor = [UIColor lightGrayColor];  
//初始化富文本对象：  
NSMutableAttributedString * attributedStr = [[NSMutableAttributedString alloc] initWithString:@"你好我好大家好"];  
//给富文本添加属性1-字体大小  
[attributedStr addAttribute:NSFontAttributeName  
                      value:[UIFont systemFontOfSize:16.0]  
                      range:NSMakeRange(2, 2)];  

效果如图1.1

1.2 问题来了，这样显示只能实现底部字体持平，并不能使缩小的字居中显示，据目前的技术来讲，只能自定义一个view，如果有好的方法，希望广告友人给与指正，下面提供一个自定义view

_changyouView = [[UIView alloc] init];
    [self addSubview:_changyouView];
    [_changyouView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.mas_equalTo(_headerImageV.mas_right).offset(kAppAdaptWidth(20));
        make.top.mas_equalTo(_integralLabel.mas_bottom).offset(kAppAdaptHeight(8));
        make.height.mas_equalTo(kAppAdaptHeight(18));
        make.width.mas_equalTo(kAppAdaptWidth(60));
    }];
    _changyouView.layer.cornerRadius = kAppAdaptHeight(8);
    _changyouView.layer.masksToBounds = YES;
    _changyouView.layer.borderColor = kHRGB(0xCCA969).CGColor;
    _changyouView.layer.borderWidth = kAppAdaptHeight(1.0);
    
    _totalLabel = [[UILabel alloc] init];
    [_changyouView addSubview:_totalLabel];
    [_totalLabel mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.mas_equalTo(_changyouView.mas_left).offset(kAppAdaptWidth(5));
        make.top.mas_equalTo(_changyouView.mas_top).offset(0);
        make.height.mas_equalTo(kAppAdaptHeight(19));
        make.width.mas_equalTo(kAppAdaptWidth(37));
    }];
    _totalLabel.text = kStr(@"Total earnings");
    _totalLabel.font = kAppFont(kAppAdaptWidth(8));
    _totalLabel.textColor = kHRGB(0xCCA969);
    _totalLabel.textAlignment = NSTextAlignmentCenter;
    
    _changyouLabel = [[UILabel alloc] init];
    [_changyouView addSubview:_changyouLabel];
    [_changyouLabel mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.mas_equalTo(_totalLabel.mas_right).offset(kAppAdaptWidth(2));
        make.top.mas_equalTo(_changyouView.mas_top).offset(kAppAdaptHeight(0));
        make.height.mas_equalTo(kAppAdaptHeight(19));
    }];
    _changyouLabel.textColor = kHRGB(0xCCA969);
    _changyouLabel.font = kAppFont(kAppAdaptHeight(14));

// 网络请求回来，设置label，重新设置view的尺寸
- (void)setupViewWithIntagral:(JFIntegral *)integral showInteface:(BOOL)showInterface {
        NSString *integralStr = [NSString stringWithFormat:@"%@ 畅由积分",points];
        _integralLabel.text = integralStr;
        [_integralLabel setPartString:@"畅由积分" attributes:@{NSFontAttributeName:kAppFont(kAppAdaptWidth(12))}];
        _changyouLabel.text = integral.homeTotalProfits;
        
        [_changyouView mas_remakeConstraints:^(MASConstraintMaker *make) {
            make.left.mas_equalTo(_headerImageV.mas_right).offset(kAppAdaptWidth(20));
            make.top.mas_equalTo(_integralLabel.mas_bottom).offset(kAppAdaptHeight(8));
            make.height.mas_equalTo(kAppAdaptHeight(19));
            make.right.mas_equalTo(_changyouLabel.mas_right).offset(kAppAdaptWidth(5));
        }];
        _changyouLabel.textAlignment = NSTextAlignmentCenter;
    }
}

大致思路是，先创建一个view，上面加两个label，label的文字从后台获取，当取到文字之后，重新设置view的宽度，为什么要重新设置view宽度呢，因为这里的文字有边框，效果如图1.2

图1.2