1、

//运行效果

self.attributeStringLabel.attributedText = [self getAttributedStringWithString:@"富为本属性字体" aString:@"颜色" aString:@"下划线"];

/**

 *  NSMutableAttributedString 简单使用demo方法

 *

 *  @param str1 第一个属性字符串

 *  @param str2 第一个属性字符串

 *  @param str3 第一个属性字符串

 *

 *  @return NSMutableAttributedString

*/

- (NSMutableAttributedString *)getAttributedStringWithString:(NSString *)str1 aString:(NSString *)str2 aString:(NSString *)str3{

    NSString *normalString = [NSString stringWithFormat:@"%@--%@--%@", str1, str2, str3];

    NSMutableAttributedString *attritedString = [[[NSMutableAttributedString alloc] initWithString:normalString] autorelease];

    //每个属性的NSRange

    NSRange range1 = [normalString rangeOfString:str1];

    NSRange range2 = [normalString rangeOfString:str2];

    NSRange range3 = [normalString rangeOfString:str3];

    //每个NSRange里的具体属性（所有属性可以到UIKit框架里面的NSAttributedString查询）

    NSDictionary *attrites1 = [NSDictionary dictionaryWithObject:[UIFont fontWithName:@"Palatino-Roman" size:20.0f] forKey:NSFontAttributeName];

    NSDictionary *attrites2 = [NSDictionary dictionaryWithObject:[UIColor purpleColor] forKey:NSForegroundColorAttributeName];

    NSDictionary *attrites3 = [NSDictionary dictionaryWithObject:[UIColor redColor] forKey:NSUnderlineColorAttributeName];

    NSDictionary *attrites4 = [NSDictionary dictionaryWithObject:[NSString stringWithFormat:@"1"] forKey:NSUnderlineStyleAttributeName];

    //设置属性

    [attritedString addAttributes:attrites1 range:range1];

    [attritedString addAttributes:attrites2 range:range2];

    [attritedString addAttributes:attrites3 range:range3];

    [attritedString addAttributes:attrites4 range:range3];

    return attritedString;

}

2、iOS7以后新添加了API可以通过URL和流来过的富文本

NSMutableAttributedString *attritedString1 = [[NSMutableAttributedString alloc] initWithFileURL:<#(NSURL *)#> options:<#(NSDictionary *)#> documentAttributes:<#(NSDictionary **)#> error:<#(NSError **)#>]

NSMutableAttributedString *attritedString2 = [NSMutableAttributedString alloc] initWithData:<#(NSData *)#> options:<#(NSDictionary *)#> documentAttributes:<#(NSDictionary **)#> error:<#(NSError **)#>;