NSAttributedString的妙用

一.给文字上面加删除线

UILabel * label = [[UILabel alloc]initWithFrame:CGRectMake(20, 50, 200, 50)]; 
[self.view addSubview:label]; label.text = @"10.00"; 
label.textAlignment = NSTextAlignmentCenter; 
label.textColor = [UIColor redColor]; 
// 横线的颜色跟随label字体颜色改变 
NSMutableAttributedString *newPrice = [[NSMutableAttributedString alloc] initWithString:[NSString stringWithFormat:@"￥%@",label.text]]; 
[newPrice addAttribute:NSStrikethroughStyleAttributeName value:@(NSUnderlinePatternSolid | NSUnderlineStyleSingle) range:NSMakeRange(0, newPrice.length)]; 
label.attributedText = newPrice;

效果：

给文字上面加删除线

二.UILabel实现图文混排

    NSMutableAttributedString *attri =  [[NSMutableAttributedString alloc] initWithString:@"连接前请先按Fn+F4切换到蓝牙连接手机/平板"];
    NSTextAttachment *attch = [[NSTextAttachment alloc] init];
    // 表情图片
    attch.image = [UIImage imageNamed:@"pop_pic_tip.png"];
     //设置图片大小
    attch.bounds = CGRectMake(0, 0, 17*(64/21.0),17);
    // 创建带有图片的富文本
    NSAttributedString *imgString = [NSAttributedString attributedStringWithAttachment:attch];
    [attri appendAttributedString:imgString];
    
    NSAttributedString *string = [[NSAttributedString alloc]initWithString:@"闪烁进入待连接状态" attributes:@{NSFontAttributeName : [UIFont systemFontOfSize:17]}];
    [attri appendAttributedString:string];
    
    self.label01 = [[UILabel alloc]init];
    [self.contentView addSubview:self.label01];
    self.label01.numberOfLines = 0;
    [self.label01 setTextColor:[UIColor colorWithRGB:0x2f3641]];
    self.label01.attributedText = attri;
    [self.label01 mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.mas_equalTo(self.contentView.mas_left).mas_offset(16);
        make.right.mas_equalTo(self.contentView.mas_right).mas_offset(-16);
        make.top.mas_equalTo(self.imgView.mas_bottom).mas_offset(15);
    }];

效果：

UILabel的图文混排