Ios 两种颜色NSMutableAttributeString

目前，我正在我的UILabel中给世界涂上“喜欢”的颜色

我想知道如何给标签上出现的其他东西上色。目前，由于范围不断变化，该功能正处于困境

NSMutableAttributedString *mutableString = nil;
NSString *notificationText = [NSString stringWithFormat:@"%@ liked your Recap.", [[object objectForKey:@"from"] valueForKey:@"name"]];
mutableString = [[NSMutableAttributedString alloc] initWithString:notificationText];

NSString *pattern = @"(liked)";
NSRegularExpression *expression = [NSRegularExpression regularExpressionWithPattern:pattern options:0 error:nil];

NSRange range = NSMakeRange(0,[notificationText length]);

[expression enumerateMatchesInString:notificationText options:0 range:range usingBlock:^(NSTextCheckingResult *result, NSMatchingFlags flags, BOOL *stop) {
    NSRange finalRange = [result rangeAtIndex:1];
    [mutableString addAttribute:NSForegroundColorAttributeName value:[UIColor orangeColor] range:finalRange];
    cell.notificationUser.attributedText = mutableString;
    cell.notificationUser.font = RobotoMedium(15.0f);
    cell.notificationTime.font = RobotoRegular(14.0f);
}];

---

正如@rmaddy指出的，您可以先设置整个字符串的颜色，然后像下面这样更改特定范围：

[mutableString addAttribute:NSForegroundColorAttributeName
                      value:[NSColor blueColor]
                      range:NSMakeRange(0, [mutableString length])];

[mutableString addAttribute:NSForegroundColorAttributeName 
                      value:[UIColor orangeColor] 
                      range:finalRange];

---

创建字符串时，将基础颜色作为初始属性传递。然后将第二种颜色应用于所需零件。