Fail attempt 1: Regex

Question

我以两个“http:// developmenter.apple.com/library/ios/#documentation/uikit/referation/UILabel_Class/Reference/UILabel.html” rel=“Nofolt noreferr”>>UIULabels 显示用户的评论,一个是用户名,另一个是信息。两个标签都有相同的 X,Y 坐标,但信息标签的预设空间与用户名的宽度相等。这一技术有助于我轻松地支持多线信息。

当用户写阿拉伯信件时会出现问题。阿拉伯语是左方语言的右侧。这意味着, 我必须在阿拉伯语字符串的 < em> end 上添加空格, 而不是开始。正如您在下面的截图中看到的, 我并没有做出这种区分, 阿拉伯信件也进入了用户名。因此, 我如何检测到 UILabel 的文本属性( https:// developer. apple.com/ library/ mac/ # documentation/ Cocoa/ Reference/ Foundation/ Classes/ NSString_ Class/ Reference/ NSstring. html )? rel= “ nofolvey noreferr” >NSString

"https://i.sstatic.net/QrKcB.png" alt="arabic"/>

Fail attempt 1: Regex

我试过使用",http://developmenter.apple.com/library/mac/#document/Foundation/Referation/Reference/NSRegularExpression_Class/Reference/Reference.html" rel=“不跟随 noreferrer”>regexes ,但以下函数总是返回每个字符串的错误, 包括阿拉伯语。

@implementation UILabel (position)

- (BOOL) containsArabic
{
    NSError* error;
    NSRegularExpression* regex = [NSRegularExpression
        regularExpressionWithPattern:@"p{Arabic}" 
        options:0
        error:&error
    ];
    return error == nil 
        && [regex 
            numberOfMatchesInString:self.text 
            options:0 
            range:NSMakeRange(0, self.text.length)] > 0;
}

@end

Fail attempt 2: NSLocale

- (BOOL) containsArabic
{
    NSString *isoLangCode = (NSString*)CFStringTokenizerCopyBestStringLanguage(
       (CFStringRef)self.text, 
       CFRangeMake(
           0, 
           self.text.length
       )
    );
    NSLocaleLanguageDirection direction = [NSLocale lineDirectionForLanguage:isoLangCode];
    NSLog(@"++++++");
    NSLog(@"%@", self.text);
    NSLog(@"%d", direction);
    return direction == NSLocaleLanguageDirectionRightToLeft;
}

输出无效 :

2012-05-28 10:59:11.454 [2110:707] MANCHESTER CITY VS MANCHESTER UNITED LIVE HD
2012-05-28 10:59:11.461 [2110:707] 0
2012-05-28 10:59:11.474 [2110:707] ++++++
2012-05-28 10:59:11.477 [2110:707] tak
2012-05-28 10:59:11.484 [2110:707] 0
2012-05-28 10:59:11.511 [2110:707] ++++++
2012-05-28 10:59:11.513 [2110:707] ŸàŸÜŸáÿßÿ±ŸÉ ÿ≥ÿπŸäÿØ
2012-05-28 10:59:11.520 [2110:707] 3
2012-05-28 10:59:11.704 [2110:707] ++++++
2012-05-28 10:59:11.712 [2110:707] ŸÜŸáÿßÿ±ŸÉ ÿ≥ÿπŸäÿØ
2012-05-28 10:59:11.740 [2110:707] 3
2012-05-28 10:59:11.763 [2110:707] ++++++
2012-05-28 10:59:11.767 [2110:707] i think i am close
2012-05-28 10:59:11.772 [2110:707] 3

Answer 1

此答案假设您使用 ARC :

NSString *stringToTest = @"Some Foreign Language";

NSString *isoLangCode = (__bridge_transfer NSString*)CFStringTokenizerCopyBestStringLanguage((__bridge CFStringRef)stringToTest, CFRangeMake(0, stringToTest.length));

NSLocaleLanguageDirection direction = [NSLocale characterDirectionForLangauge:isoLangCode];

然后您可以使用 NS locale API s 线条 DirectForLanguage: 确定语言线条方向的方法。

Answer 2

在以下函数中添加以下代码:

- (BOOL)textView:(UITextView *)aTextView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text
{
      NSString *isoLangCode = (__bridge_transfer NSString*)CFStringTokenizerCopyBestStringLanguage((__bridge CFStringRef)text, CFRangeMake(0, text.length));

      if([isoLangCode isEqualToString:@"ar"])
      {
         //Arabic
      }
      else
      {
         //Other language
      }
}

Answer 3

- (BOOL)Direction:(NSString *)text
{
    NSString *isoLangCode = (__bridge_transfer NSString*)CFStringTokenizerCopyBestStringLanguage((__bridge CFStringRef)text, CFRangeMake(0, text.length));

    if([isoLangCode isEqualToString:@"ar"])
    {
        return YES;
    }
    return NO;
}

Fail attempt 1: Regex

Fail attempt 2: NSLocale

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