iOS-NSMutableAttributedString-调整

需要的效果:

1. 配置文案拼接，中间使用"|"分割，最多两行，超出...代替
2. 关键点在于NSBaselineOffsetAttributeName属性； 分割"|"明显靠下了，通过NSBaselineOffsetAttributeName向上调整了2个单位

_configL = [[UILabel alloc] init];
_configL.numberOfLines = 2;
_configL.lineBreakMode = NSLineBreakByTruncatingTail;

NSArray *configList = @[@"旗舰型", @"2.0TD-7DCT EVO", @"翠羽幻彩车漆", @"元气蓝双", @"21英寸多幅射线轮毂"];
NSString *configStr = [NSString string];
for (NSString *str in configList) {
    if (StrEmpty(configStr)) {
        configStr = [configStr stringByAppendingFormat:@"%@  |", str];
    } else {
        configStr = [configStr stringByAppendingFormat:@"  %@  |", str];
    }
}
if ([configStr hasSuffix:@"|"]) {
    configStr = [configStr substringToIndex:configStr.length - 1];
}

NSMutableParagraphStyle *paragraphStyle = [NSMutableParagraphStyle new];
paragraphStyle.lineSpacing = 8;
NSDictionary *attributes = @{
    NSFontAttributeName:FONT_Regular(Width_SIZEFIT(12)),
    NSForegroundColorAttributeName:RGB_HEX(0x7D7D7D),
    NSParagraphStyleAttributeName:paragraphStyle};

NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:configStr attributes:attributes];
for (int i = 0; i < configStr.length; i++) {
    NSString *colorStr = [configStr substringWithRange:NSMakeRange(i, 1)];
    if([colorStr isEqualToString:@"|"]) {
        [attributedString addAttribute:NSForegroundColorAttributeName value:RGB_HEX(0xC8C8C8) range:NSMakeRange(i, 1)];
        [attributedString addAttribute:NSFontAttributeName value:FONT_Regular(8) range:NSMakeRange(i, 1)];
        [attributedString addAttribute:NSBaselineOffsetAttributeName value:@2 range:NSMakeRange(i, 1)];
    }
}
_configL.attributedText = attributedString;

实现效果: