Question

我从XML文件中得到以下文字：

"Weekly menus from December 21<sup>st</sup> till 28<sup>th</sup>"并希望它们显示为：＆＃34;每周菜单从12月21日^st直到28 ^th＆＃34;

-Tags是因为XML文件用于html和iOS。现在我想＆＃34;转移＆＃34;日期中的st / nd / rd / th并生成以下代码：

NSString *basicString = dieMenueDaten.SubtitelE;

NSDictionary *attribute = @{(NSString*)kCTSuperscriptAttributeName: @1 };
NSMutableAttributedString *subStringTh = [[NSMutableAttributedString alloc] initWithString:@"th" attributes:attribute];
NSMutableAttributedString *newSubtitleE = [[NSMutableAttributedString alloc] initWithString:basicString];
NSMutableAttributedString *replaceTh = [[NSMutableAttributedString alloc] initWithString:@"<sup>th</sup>"];

NSRange laenge = NSMakeRange(0, basicString.length);

newSubtitleE = [[newSubtitleE mutableString] stringByReplacingOccurrencesOfString:replaceTh withString:subStringTh options:NSCaseInsensitiveSearch range:laenge];

这样做我得到了

不兼容的指针类型发送＆＃39; NSMutableAttributedString *＆＃39;参数类型＆＃39; NSString * _Nonnull＆＃39;

和

不兼容的指针类型分配给＆＃39; NSMutableAttributedString *＆＃39;来自＆＃39; NSString *＆＃39;

我该怎么做才能避免错误消息？

Answer 1

来自NSString Class Reference

- (NSString *)stringByReplacingOccurrencesOfString:(NSString *)target
                                    withString:(NSString *)replacement
                                       options:(NSStringCompareOptions)options
                                         range:(NSRange)searchRange

此方法为目标和替换采用2 NSString个参数，而不是两个NSMutableAttributedString参数。

您还可以尝试使用replaceTh.string和subStringTh.string来获取您提供的每个NSString的{{1}}属性。

您的第二个警告是相关的，因为上述方法会返回NSMutableAttributedString，而不是NSString，您已声明NSMutableAttributedString。

Answer 2

好的，由于快速提示，我按照以下方式进行了更改（此处有详细说明）：

- (NSMutableAttributedString *)attributedSubTitleString:(NSString *)string;
{
NSMutableAttributedString *attString = [[NSMutableAttributedString alloc] initWithString:string];
UIFont *smallFont = [UIFont boldSystemFontOfSize:9.0f];

[attString beginEditing];
[attString addAttribute:NSFontAttributeName value:(smallFont) range:[string rangeOfString:@"th"]];
[attString addAttribute:NSFontAttributeName value:(smallFont) range:[string rangeOfString:@"th" options:NSBackwardsSearch]];
[attString addAttribute:(NSString*)kCTSuperscriptAttributeName value:@"1" range:[string rangeOfString:@"th"]];
[attString addAttribute:(NSString*)kCTSuperscriptAttributeName value:@"1" range:[string rangeOfString:@"th" options:NSBackwardsSearch]];

[attString addAttribute:NSFontAttributeName value:(smallFont) range:[string rangeOfString:@"st"]];
[attString addAttribute:NSFontAttributeName value:(smallFont) range:[string rangeOfString:@"st" options:NSBackwardsSearch]];
[attString addAttribute:(NSString*)kCTSuperscriptAttributeName value:@"1" range:[string rangeOfString:@"st"]];
[attString addAttribute:(NSString*)kCTSuperscriptAttributeName value:@"1" range:[string rangeOfString:@"st" options:NSBackwardsSearch]];

[attString addAttribute:NSFontAttributeName value:(smallFont) range:[string rangeOfString:@"nd"]];
[attString addAttribute:NSFontAttributeName value:(smallFont) range:[string rangeOfString:@"nd" options:NSBackwardsSearch]];
[attString addAttribute:(NSString*)kCTSuperscriptAttributeName value:@"1" range:[string rangeOfString:@"nd"]];
[attString addAttribute:(NSString*)kCTSuperscriptAttributeName value:@"1" range:[string rangeOfString:@"nd" options:NSBackwardsSearch]];

[attString addAttribute:NSFontAttributeName value:(smallFont) range:[string rangeOfString:@"rd"]];
[attString addAttribute:NSFontAttributeName value:(smallFont) range:[string rangeOfString:@"rd" options:NSBackwardsSearch]];
[attString addAttribute:(NSString*)kCTSuperscriptAttributeName value:@"1" range:[string rangeOfString:@"rd"]];
[attString addAttribute:(NSString*)kCTSuperscriptAttributeName value:@"1" range:[string rangeOfString:@"rd" options:NSBackwardsSearch]];

[attString endEditing];
return attString;
}

并在cellForRowAtIndexPath中：

NSString *basicString = dieMenueDaten.SubtitelE;

basicString = [basicString stringByReplacingOccurrencesOfString:@"<sup>" withString:@""];
basicString = [basicString stringByReplacingOccurrencesOfString:@"</sup>" withString:@""];

NSMutableAttributedString *newSubtitleE = [[NSMutableAttributedString alloc] initWithString:basicString];

newSubtitleE = [self attributedSubTitleString:basicString];
....
        cell.MenueTitel.text = dieMenueDaten.TitelE;
        cell.MenueSubtitel.attributedText = newSubtitleE;

适合我的作品。

Answer 3

检查此存储库：DecodeHTML.swift

stringByReplacingOccourencesOfString with NSMutableAttributedString

3 个答案: