//iOS编码转码URLEncoder.encode
NSString *reqJson = [BGMD5 dictionaryToJson:payWayInfo];
NSString *encodedValue = (NSString*)CFBridgingRelease(CFURLCreateStringByAddingPercentEscapes(nil,(CFStringRef)reqJson, nil,(CFStringRef)@"!*'();:@&=+$,/ %#[]", kCFStringEncodingUTF8));
NSLog(@"encodedValue = %@", encodedValue);
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