利用NSMutableAttributedString实现lab

UILabel*label = [[UILabelalloc]initWithFrame:CGRectMake(0,0,self.frame.size.width,self.frame.size.height)];

//使用斜杠n是字体显示为两行

label.text=@"随堂测验\n（学习完成后，开始测试）";

label.font=  [UIFontsystemFontOfSize:10];

//使用换行符号切莫忘记写这句

label.numberOfLines=0;

label.textColor= [UIColorhexChangeFloat:@"A5A5A5"];

//利用属性字符串修改字体大小颜色

NSMutableAttributedString*AttributedStr = [[NSMutableAttributedStringalloc]initWithString:label.text];

[AttributedStraddAttribute:NSForegroundColorAttributeName

value:[HuConfigrationuiColorFromString:@"#D3D3D3"]

range:NSMakeRange(0,4)];

[AttributedStraddAttribute:NSFontAttributeName

value:[UIFontcustomFontSize:18]

range:NSMakeRange(0,4)];

//修改行间距

NSMutableParagraphStyle*paragraphStyle = [[NSMutableParagraphStylealloc]init];

[paragraphStylesetLineSpacing:4];

[AttributedStraddAttribute:NSParagraphStyleAttributeName

value:paragraphStyle

range:NSMakeRange(0, [label.textlength])];

label.attributedText= AttributedStr;

label.textAlignment=NSTextAlignmentCenter;

[selfaddSubview:label];

效果图：