使用AFNetworking 2.0 请求数据时出现错误 Request failed: unacceptable content-type: text/html 解决方法

manager.responseSerializer.acceptableContentTypes = [NSSet setWithObject:@"text/html"];

AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
manager.responseSerializer.acceptableContentTypes = [NSSet setWithObject:@"text/html"];
NSDictionary *parameters = @{@"foo":@"bar"};
[manager POST:@"http://example.com/resources.json" parameters:parameters success:^(AFHTTPRequestOperation *operation, id responseObject) {
NSLog(@"JSON: %@",responseObject);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(@"Error:%@",error);
}];