NSAttributedString叫做富文本,是一种带有属性的字符串,通过它可以轻松的在一个字符串中表现出多种字体、字号、字体大小等各不相同的风格,还可以对段落进行格式化。
以下是实现代码:
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 1000, 500)];
label.numberOfLines = 0;//设置段落paragraphStyle,numberOfLines必须为0
label.lineBreakMode = NSLineBreakByWordWrapping;
label.backgroundColor = [UIColor redColor];
NSString *str1 = @"全球开发者大会(WWDC)";
NSString *str2 = @"美国在旧金山芳草地";
NSString *str5 = @"太平洋时间";
NSString *str3 = @"开始:2016-03-10";
NSString *str4 = @"结束:2016-03-20";
NSString *string = [NSString stringWithFormat:@"%@\n%@\n%@\n%@\n%@",str1,str2,str5,str3,str4];
NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:string];
NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
paragraphStyle.lineSpacing = 20.0;
NSDictionary *attrsDictionary1 = @{NSFontAttributeName:[UIFont systemFontOfSize:30],
NSParagraphStyleAttributeName:paragraphStyle};
NSDictionary *attrsDictionary2 = @{NSParagraphStyleAttributeName:paragraphStyle};
//给str1添加属性,字体加粗,并且设置段落间隙
[attributedString addAttributes:attrsDictionary1 range:NSMakeRange(0, str1.length)];
//给str2设置段落间隙
[attributedString addAttributes:attrsDictionary2 range:NSMakeRange(str1.length, str2.length)];
//attributedString如果还有别的样式需要添加可以这样依次加属性
label.attributedText = attributedString;
[self.view addSubview:label];