由于最近忙着开发项目，好几天没来写博客了。我把最近遇到的一个小bug来和大家分享一下。
最近iOS开发中，客户端需要使用http POST去进行请求服务器。需要发送的是XML格式的，当然接收的也是XML。我们准备使用的是AFNetworking来实现。关于AFnetworking的使用以及Cocoapods包管理，请参考我的其他几篇博客：《iOS项目开发实战——使用AFNetworking进行Http Get请求》，《查看进行AFNetworking请求时的头部信息》，《iOS包管理工具Cocoapods的安装与使用》。我进行请求的代码实现如下：
-(void)query05{
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
manager.responseSerializer.acceptableContentTypes = [NSSet setWithObject:@"text/html"];
NSString *str = @"<?xml version=\"1.0\" encoding=\"utf-8\"?>"
"<root>"
"<command_type>****</command_type>"
"<id>***</id>"
"<action>***</action>"
"<value>***</value>"
"</root>";
NSDictionary *parameters = @{@"test":str};
[manager POST:@"http://***.php"parameters:parameters
success:^(AFHTTPRequestOperation *operation,id responseObject)
{
NSLog(@"Success: %@", responseObject);
}failure:^(AFHTTPRequestOperation *operation,NSError *error)
{
NSLog(@"Error: %@", error);
}];
}Error Domain=NSCocoaErrorDomain Code=3840 "JSON text did not start with array or object and option to allow fragments not set." UserInfo={NSDebugDescription=JSON text did not start with array or object and option to allow fragments not set.}
如图：
这个bug的确很诡异，我根本没有做任何关于JSON的操作，却给我报了一个JSON的错。最后查了很多资料，解决方案如下：主要是增加了几行代码：
- (void)query05{
//增加这几行代码；
AFSecurityPolicy *securityPolicy = [[AFSecurityPolicy alloc] init];
[securityPolicy setAllowInvalidCertificates:YES];
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];//这里进行设置；
[manager setSecurityPolicy:securityPolicy];
manager.responseSerializer = [AFHTTPResponseSerializer serializer];
NSString *str = @"<?xml version=\"1.0\" encoding=\"utf-8\"?>"
"<root>"
"<command_type>***</command_type>"
"<id>***</id>"
"<action>***</action>"
"<value>***</value>"
"</root>";
NSDictionary *parameters = @{@"test" : str};
[manager POST:@"http://***.php"
parameters:parameters
success:^(AFHTTPRequestOperation *operation,id responseObject){
NSString *string = [[NSString alloc] initWithData:responseObject encoding:NSUTF8StringEncoding];
NSLog(@"成功: %@", string);
}
failure:^(AFHTTPRequestOperation *operation,NSError *error){
NSLog(@"失败: %@", error);
}];
}
github主页：https://github.com/chenyufeng1991
。欢迎大家访问！
iOS开发Post请求错误：Error Domain=NSCocoaErrorDomain Code=3840 "JSON text did not start with array or ...
原文：http://blog.csdn.net/chenyufeng1991/article/details/49980205