清理多余代码，优化

单军华

2018-04-28 1d39caf7235522ae121db7a188ba41a706217407

 pregnancy_guard/BaseProject/ThirdClass/AFNetworking/AFNetworking/AFURLRequestSerialization.m

@@ -1252,9 +1252,13 @@
        }
    }];

    if (parameters) {
        if (![mutableRequest valueForHTTPHeaderField:@"Content-Type"]) {
    if (parameters)
    {
        if (![mutableRequest valueForHTTPHeaderField:@"Content-Type"])
        {
            //[mutableRequest setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
            [mutableRequest setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
            //[mutableRequest setValue:@"text/json" forHTTPHeaderField:@"Content-Type"];
        }

        [mutableRequest setHTTPBody:[NSJSONSerialization dataWithJSONObject:parameters options:self.writingOptions error:error]];