AFHTTPRequestOperationManager网络请求的时候添加一个菊花，requestmapping

问：

Can you help me to understand, how to use UIActivityIndicatorView+AFNetworking or UIProgressView+AFNetworking. Do I need to create one more UIViewController and if yes, where do I need to implement it? have found out that I need to use setProgressWithUploadProgressOfOperation or setAnimatingWithStateOfOperation, but I still need an example.

my code is:

AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
manager.responseSerializer = [AFJSONResponseSerializer serializer];
[manager.requestSerializer setValue:@"application/json" forHTTPHeaderField:@"Accept"];
[manager.requestSerializer setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
[manager.requestSerializer setValue:@"" forHTTPHeaderField:@""];
manager.responseSerializer.acceptableContentTypes = [NSSet setWithObject:@"text/html"];
[manager GET:@"blablabla" parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {

    // 3
    //[self.view setAnimatingWithStateOfOperation:operation];
    NSLog(@"JSON: %@", responseObject);
    NSArray *carsList = responseObject[@"data"];
    [self showStream:carsList];

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

    // 4
    UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Error"
                                                        message:[error localizedDescription]
                                                       delegate:nil
                                              cancelButtonTitle:@"Ok"
                                              otherButtonTitles:nil];
    [alertView show];
}];

答：

I guess, you want to show UIActivityIndicator while operation is loading. So you have to do something like this:

// your code

AFHTTPRequestOperation *operation = [manager GET:@"blablabla" parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {
    // even more code
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
    // and here
}];

UIActivityIndicatorView *indicatorView = [[UIActivityIndicatorView alloc] init];
indicatorView.frame = /*calculate frame here*/;
[self.view addSubView:indicatorView];
[indicatorView setAnimatingWithStateOfOperation:operation];

------------------------------------------------------------------------
官方教程
https://github.com/AFNetworking/AFNetworking/wiki/AFNetworking-2.0-Migration-Guide

AFHTTPRequestOperation Example

NSURL *URL = [NSURL URLWithString:@"http://example.com/foo.json"];
NSURLRequest *request = [NSURLRequest requestWithURL:URL];
AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc]
                                     initWithRequest:request];
operation.responseSerializer = [AFJSONResponseSerializer serializer];
[operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
    NSLog(@"%@", responseObject);
} failure:nil];
[operation start];

AFHTTPRequestOperationManager Example

AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
manager.responseSerializer = [AFJSONResponseSerializer serializer];
[manager GET:@"http://example.com/foo.json" parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {
    NSLog(@"%@", responseObject);
} failure:nil];

-------------------------------------------------------

AFHTTPRequestOperationManager注意点

ActionSheet在控制器view上，因为点击拍照时，会modal出另外一个控制器，当前的控制器view就会从窗口中移除。就会报ActionSheet不在窗口上。

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    UIActionSheet *sheet = [[UIActionSheet alloc] initWithTitle:@"图片上传" delegate:self cancelButtonTitle:@"取消" destructiveButtonTitle:nil otherButtonTitles:@"拍照", @"相册",nil];
    [sheet showInView:self.view];
}

#pragma mark - 实现UIActionSheetDelegate代理方法
- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
{
    UIImagePickerController *ipc = [[UIImagePickerController alloc] init];
    ipc.delegate = self;
    switch (buttonIndex) {
        case 0:
            if (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) return;
            ipc.sourceType = UIImagePickerControllerSourceTypeCamera;
            break;
        case 1:
            if (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary]) return;
            ipc.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
            break;
           
        default:
            break;
    }
    [self presentViewController:ipc animated:YES completion:nil];
}

注意：

 

如果在switch的case中定义一个局部变量，需要用大括号括住。

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    // 关闭UIImagePickerController控制器
    [self dismissViewControllerAnimated:YES completion:nil];
    NSLog(@"%@",info);
    // 获取图片
    UIImage *image = info[UIImagePickerControllerOriginalImage];
    self.imageV.image = image;
}

- (IBAction)upLoad
{
    // 创建一个管理者
    AFHTTPRequestOperationManager *manger = [AFHTTPRequestOperationManager manager];
    // 设置参数
    NSMutableDictionary *params = [NSMutableDictionary dictionary];
    params[@"username"] = @"123";
    params[@"pwd"] = @"123";
   
    // 设置URL
    NSString *url = @"http://192.168.15.56:8080/MJServer/upload";
    [manger POST:url parameters:params constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {

          

          注意：

          在发送请求之前会自动调用这个block
        需要在这个block中添加文件参数到formData中
        NSData *fileData = UIImageJPEGRepresentation(self.imageV.image, 1.0);
        [formData appendPartWithFileData:fileData name:@"file" fileName:@"image.png" mimeType:@"image/png"];
    } success:^(AFHTTPRequestOperation *operation, id responseObject) {
        NSLog(@"上传成功");
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"上传失败");
    }];
}

注意：

1.保留照片的质量

NSData *fileData = UIImageJPEGRepresentation(self.imageV.image, 1.0);

2.AFN不能监听文件的上传进度，ASI可以监听文件的上传进度。

3.需要上传的文件的具体数据

FileData : 需要上传的文件的具体数据
name : 服务器那边接收文件用的参数名
fileName : （告诉服务器）所上传文件的文件名
mimeType : 所上传文件的文件类型

NSData *fileData = UIImageJPEGRepresentation(self.imageV.image, 1.0);
[formData appendPartWithFileData:fileData name:@"file" fileName:@"image.png" mimeType:@"image/png"];

4.需要上传的文件的URL路径

FileURL : 需要上传的文件的URL路径
name : 服务器那边接收文件用的参数名
fileName : （告诉服务器）所上传文件的文件名
mimeType : 所上传文件的文件类型
NSURL *url = [[NSBundle mainBundle] URLForResource:@"itcast" withExtension:@"txt"];
[formData appendPartWithFileURL:url name:@"file" fileName:@"test.txt" mimeType:@"text/plain" error:nil];