如何在NSString中避免unicode字符？ [英] How can I escape unicode characters in a NSString?

问题描述

pre $ NSString * someString = @ 明斯特;
NSDictionary * someDict = [NSDictionary dictionaryWithObjectsAndKeys：
someString，@thestring];
NSLog（@someDict：％@，[someDict description]）;


控制台输出如下所示：

  unicode_test [3621：903] someDict：
 {
 thestring =M\U00fcnster; 
} 
  

与字符串的unicode字符转义。
是否有任何方法将NSString转换为此转义表示？

解决方案

可以使用循环来解决问题在给定字符串的UniChar字符串表示。实现为NSString的扩展，它看起来像这样：

   - （NSString *）escapedUnicode 
 {
 NSMutableString * uniString = [[NSMutableString alloc] init]; 
 UniChar * uniBuffer =（UniChar *）malloc（sizeof（UniChar）* [self length]）; 
 CFRange stringRange = CFRangeMake（0，[self length]）; 
 
 CFStringGetCharacters（（CFStringRef）self，stringRange，uniBuffer）; （int i = 0; i< [self length]; i ++）{
 if（uniBuffer [i]> 0x7e）
 [uniString appendFormat：@ \\u％04x，uniBuffer [i]]; 
 else 
 [uniString appendFormat：@％c，uniBuffer [i]]; 
} 
 
 free（uniBuffer）; 
 
 NSString * retString = [NSString stringWithString：uniString]; 
 [uniString release]; 
 
 return retString; 
} 
  

When I store a NSString inside some NSDictionary and log that dictionary to the console like this:

NSString *someString = @"Münster";  
NSDictionary *someDict = [ NSDictionary dictionaryWithObjectsAndKeys: 
    someString, @"thestring" ];
NSLog ( @"someDict: %@", [ someDict description ] );

The console output looks like this:

unicode_test[3621:903] someDict:
{
    thestring = "M\U00fcnster";
}

with the string's unicode character escaped. Is there any method to convert a NSString to this escaped representation?

解决方案

The problem could be solved using a loop on a UniChar-string representation of the given string. Implemented as extension on NSString it would look something like this:

- (NSString *) escapedUnicode  
{  
    NSMutableString *uniString = [ [ NSMutableString alloc ] init ];  
    UniChar *uniBuffer = (UniChar *) malloc ( sizeof(UniChar) * [ self length ] );  
    CFRange stringRange = CFRangeMake ( 0, [ self length ] );  

    CFStringGetCharacters ( (CFStringRef)self, stringRange, uniBuffer );  

    for ( int i = 0; i < [ self length ]; i++ ) {  
        if ( uniBuffer[i] > 0x7e )  
            [ uniString appendFormat: @"\\u%04x", uniBuffer[i] ];  
        else  
            [ uniString appendFormat: @"%c", uniBuffer[i] ];  
    }  

    free ( uniBuffer );  

    NSString *retString = [ NSString stringWithString: uniString ];  
    [ uniString release ];  

    return retString;  
}

这篇关于如何在NSString中避免unicode字符？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！