javascript 的 encodeURIComponent 函数用 Objective-C 实现

NSString *str = CFBridgingRelease(CFURLCreateStringByAddingPercentEscapes(NULL, (__bridge CFStringRef)someStringToEncode, NULL, (__bridge CFStringRef)@"!*'"();:@&=+$,/?%#[]% ", CFStringConvertNSStringEncodingToEncoding(NSUTF8StringEncoding)));

对应的javascript 代码

var str = encodeURIComponent(str);

OC函数：

+(NSString*)encodeURIComponent:(NSString*)str{
   return CFBridgingRelease(CFURLCreateStringByAddingPercentEscapes(NULL, (__bridge CFStringRef)str, NULL, (__bridge CFStringRef)@"!*'"();:@&=+$,/?%#[]% ", CFStringConvertNSStringEncodingToEncoding(NSUTF8StringEncoding)));  
}

欢迎各位指正