NSString编码转换

     常有编码方式有很多种,现在列出之间的转换方式

NSString To UFT-8

[cpp] view plaincopyprint?

1. NSString *str2 =@"深";  
2. const char * s = [str2 UTF8String];  

     出现类似这样格式的字段"\\U6df1\\U5733\\U56fd\\U5f00\\U884c01\\U673a\\U623",通常为Unicode码,转换测试函数为

[cpp] view plaincopyprint?

1. - (NSString *)replaceUnicode:(NSString *)unicodeStr {    
2.     NSString *tempStr1 = [unicodeStr stringByReplacingOccurrencesOfString:@"\\u" withString:@"\\U"];    
3.     NSString *tempStr2 = [tempStr1 stringByReplacingOccurrencesOfString:@"\"" withString:@"\\\""];    
4.     NSString *tempStr3 = [[@"\"" stringByAppendingString:tempStr2] stringByAppendingString:@"\""];    
5.     NSData *tempData = [tempStr3 dataUsingEncoding:NSUTF8StringEncoding];    
6.     NSString* returnStr = [NSPropertyListSerialization propertyListFromData:tempData    
7.                                                            mutabilityOption:NSPropertyListImmutable     
8.                                                                      format:NULL    
9.                                                            errorDescription:NULL];    
10.       
11.     return [returnStr stringByReplacingOccurrencesOfString:@"\\r\\n" withString:@"\n"];    
12. }    

    出现类似这样格式的字段"深圳银行",通常为GBK码,转换方式为

[cpp] view plaincopyprint?

1. NSURL *url = [NSURL URLWithString:str2];  
2.     NSData *responseData = [NSData dataWithContentsOfURL:url];  
3.     NSStringEncoding enc = CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingGB_18030_2000);  
4.     NSString *responseString = [[NSString alloc] initWithData:responseData encoding:enc];