URL有中文，进行特殊符号转换

/** 特殊符号转换 */
-(NSString * )urlEncle:(NSString *)def
{
    NSString *outputStr = (NSString *)CFBridgingRelease(CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault,(CFStringRef)def,NULL,                                                                                              (CFStringRef)@"!*'();:@&=+$,/?%#[]",kCFStringEncodingUTF8));
    return outputStr;
}