IOS 7 AFNetworking 2.0 查看刷新问题

Question

首先我想说的是，我遇到的问题是关于我自己的代码是如何设置的，而不是 IOS 或 AFNetworking。

我将展示 1 个示例，其中即使从服务器接收到更新的 JSON 响应对象，视图也不会立即刷新。

第一个视图中使用了 2 个视图，下面的按钮将用户带到第二个视图，在那里他可以上传一张图像，然后将在第一个视图中显示。

- (IBAction)editImage:(id)sender {
UIStoryboard* storyboard = [UIStoryboard storyboardWithName:@"Main_iPhone" bundle:nil];
TDUserProfileViewController * vc = [storyboard instantiateViewControllerWithIdentifier:@"TDUserProfileImageEditViewController"];
[self.navigationController pushViewController:vc animated:YES];
}

以下代码将新数据上传到服务器，然后获取有关服务器上图像地址的新数据。

- (IBAction)dataSubmitToServer{


//    NSLog(@"photo: %@", self.photoData);
 NSString * userID = [[NSUserDefaults standardUserDefaults] objectForKey:USERID];
//make the call to the web API
NSString* command = @"setProfilePhoto";
self.params =[NSMutableDictionary dictionaryWithObjectsAndKeys:command, @"command", userID, @"userid", nil];

//////////////////
NSLog(@"%@", self.params);


self.photoName = @"newname.png";
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];



manager.responseSerializer = [AFHTTPResponseSerializer serializer];
[manager POST:BaseURLString parameters:self.params constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {

    [formData appendPartWithFileData:UIImageJPEGRepresentation(self.userPhoto.image, 1)
                                name:@"image"
                            fileName:self.photoName
                            mimeType:@"image/jpeg"];
} success:^(AFHTTPRequestOperation *operation, id responseObject) {


    NSLog(@"JSON: %@", responseObject);

       } failure:^(AFHTTPRequestOperation *operation, NSError *error) {

    NSLog(@"Error: %@", [error localizedDescription]);

    [TDPublicFunctions showDefaultAlert:@"Error" body:[error description]];
}];

[self getNewProfileData];


[[NSUserDefaults standardUserDefaults] synchronize];


}

-(void)getNewProfileData{
/*start getting new data for profile pic and status message*/

NSString* command = @"displayProfileData";

NSString * userID = [[NSUserDefaults standardUserDefaults]  objectForKey:USERID];

NSMutableDictionary* params =[NSMutableDictionary dictionaryWithObjectsAndKeys:command, @"command",  userID,@"userid", nil];

NSLog( @"%@", params);
[SVProgressHUD showWithStatus:@"Loading..." maskType:SVProgressHUDMaskTypeBlack];

AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
[manager POST:BaseURLString parameters:params success:^(AFHTTPRequestOperation *operation, id responseObject) {
    NSLog(@"JSON: %@", responseObject);
    [SVProgressHUD dismiss];
    if([responseObject objectForKey:@"error"])
    {
        [[[UIAlertView alloc] initWithTitle:@"Data Retrieval Error" message:[responseObject description] delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles:nil, nil] show];
    }
    else
    {
        NSString * profilePhoto = [[[responseObject objectForKey:@"result"] objectAtIndex:0] objectForKey:@"profile_picture"];
        NSString * status = [[[responseObject objectForKey:@"result"] objectAtIndex:0] objectForKey:@"status"];
        NSString * statusMsg = [[[responseObject objectForKey:@"result"] objectAtIndex:0] objectForKey:@"status_message"];

        if(profilePhoto && ![profilePhoto isKindOfClass:[NSNull class]])
            [[NSUserDefaults standardUserDefaults] setObject:profilePhoto forKey:PROFILE_PHOTO];
        if(status && ![status isKindOfClass:[NSNull class]])
            [[NSUserDefaults standardUserDefaults] setObject:status forKey:STATUS];
        if(statusMsg && ![statusMsg isKindOfClass:[NSNull class]])
            [[NSUserDefaults standardUserDefaults] setObject:statusMsg forKey:STATUS_MESSAGE];

    }

} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
    NSLog(@"Error: %@", error);
}];
//end of getting data for status message and profile pic
}

现在，一旦上述过程结束，HUD 应该会停止，当点击视图上的后退按钮时，第一个视图中应该会出现新上传的图像。下面的代码是我为了让图像刷新视图而尝试的许多事情中的最后一个： -(void) viewWillAppear:(BOOL)动画 {

NSString * profPic = [[NSUserDefaults standardUserDefaults] objectForKey:PROFILE_PHOTO];
NSLog(@"profilepic: %@", profPic);
//    NSString* status = [[NSUserDefaults standardUserDefaults] objectForKey:STATUS];
NSString * statusMsg = [[NSUserDefaults standardUserDefaults] objectForKey:STATUS_MESSAGE];
if(profPic)
    [photo loadIconForProduct:profPic];

if(statusMsg)
    statusMsgView.text = statusMsg;

//self.view=nil;
//[self viewDidLoad];
[self getFriendsList];
[photo setNeedsDisplay];
[self.view setNeedsDisplay];
}

上传图片后，第一次上传图片时可能会起作用，但如果用户再次按下editImage按钮并上传另一张图片，则不起作用。

做错了什么？如果还有什么我可以提供的，请告诉我。

谢谢。

Answer 1

正如我在此处看到的，您将返回一个 URL 作为 profilePhoto 的结果。所以你不妨使用 AFNetworking 功能：

我假设照片是 UIImageView。

[photo setImageWithURL:[NSURL URLWithString:profPic] placeholderImage:[UIImage imageNamed:@"somePlaceholderImage"]];