以一個(gè)頭像上傳為例子.

• 使用AFN上傳圖片

• 效果如下:

  
  
  效果圖1

效果圖2

效果圖3

1. 先給ViewController控制器添加一張圖片,添加點(diǎn)擊手勢(shì)

UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tapAction)];
    [_imageV addGestureRecognizer:tap];
    _imageV.userInteractionEnabled = YES;
    _imageV.layer.cornerRadius = 50;
    _imageV.layer.masksToBounds = YES;
    _imageV.image = [UIImage imageNamed:@"fire.jpg"];

2. 手勢(shì)點(diǎn)擊的實(shí)現(xiàn)

-(void)tapAction{
    UIActionSheet *action = [[UIActionSheet alloc] initWithTitle:nil delegate:self cancelButtonTitle:@"退出" destructiveButtonTitle:nil otherButtonTitles:@"相機(jī)",@"相冊(cè)", nil];
//    action.actionSheetStyle = UIActionSheetStyleBlackTranslucent;
    [action showInView:self.view];
}

3. 設(shè)置代理,當(dāng)點(diǎn)擊actionsheet的時(shí)候,實(shí)現(xiàn)代理方法

-(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex{
    UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];
    //        設(shè)置代理
    imagePickerController.delegate = self;
    //        允許被編輯
    imagePickerController.allowsEditing = YES;
    self.imagePickerController = imagePickerController;
    if (buttonIndex == 1) {
//        設(shè)置從圖庫里面選擇圖片
        _imagePickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
        [self presentViewController:_imagePickerController animated:YES completion:nil];
    }else if(buttonIndex == 0){
//        判斷是是否支持相機(jī)
        if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
//            設(shè)置從相機(jī)獲取圖片
            _imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera;
            [self presentViewController:_imagePickerController animated:YES completion:nil];
        }else
        {
            UIAlertView *alertView = [[UIAlertView alloc]initWithTitle:@"警告" message:@"請(qǐng)使用真機(jī)進(jìn)行測(cè)試" delegate:self cancelButtonTitle:@"OK" otherButtonTitles: nil];
            [alertView show];
            NSLog(@"模擬其中無法打開照相機(jī),請(qǐng)?jiān)谡鏅C(jī)中使用");
        }

    }
}

4. 點(diǎn)擊圖片后進(jìn)入代理方法

-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info{
     //UIImagePickerControllerCropRect // 編輯裁剪區(qū)域
     //UIImagePickerControllerEditedImage // 編輯后的UIImage
     //UIImagePickerControllerMediaType // 返回媒體的媒體類型
     // UIImagePickerControllerOriginalImage // 原始的UIImage
     //UIImagePickerControllerReferenceURL // 圖片地址
    [self dismissViewControllerAnimated:YES completion:nil];
    NSString *type = [info objectForKey:UIImagePickerControllerMediaType];
 if ([type isEqualToString:@"public.image"]) {
UIImage *image = [info objectForKey:UIImagePickerControllerEditedImage];
      //    將該圖片保存到本地
      [self saveImage:image withName:@"avatar.png"];
      NSString *fullPath = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0] stringByAppendingPathComponent:@"avatar.png"];
    UIImage *saveImage = [[UIImage alloc] initWithContentsOfFile:fullPath];
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
     // 設(shè)置時(shí)間格式
      formatter.dateFormat = @"yyyyMMddHHmmss";
      NSString *str = [formatter stringFromDate:[NSDate date]];
      NSString *fileName = [NSString stringWithFormat:@"%@.png", str];
      //    設(shè)置為頭像
      self.imageV.image = saveImage;
      //    上傳到服務(wù)器
      NSDictionary *dict = @{
      @"username":@"123456",
      };
      [self.manager POST:@"http://120.25.226.186:32812/upload" parameters:dict constructingBodyWithBlock:^(id<AFMultipartFormData>  _Nonnull formData) {
      //將圖片以表單形式上傳
     /*
     Data: 需要上傳的數(shù)據(jù)
     name: 服務(wù)器參數(shù)的名稱
     fileName: 文件在服務(wù)器上保存的名稱
     mimeType: 文件的類型
     */
      NSLog(@"%@",fullPath);
      NSData *data1=[NSData dataWithContentsOfFile:fullPath];
      [formData appendPartWithFileData:data1 name:@"file" fileName:fileName mimeType:@"image/png"];
      } progress:^(NSProgress * _Nonnull uploadProgress) {
      NSLog(@"%f",1.0 *uploadProgress.completedUnitCount/uploadProgress.totalUnitCount);
            
      } success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
      NSLog(@"成功---%@---%@",[responseObject class],responseObject);
      } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
      NSLog(@"失敗---%@",error);
     }];
    }   
}
-(void)saveImage:(UIImage *)currentImage withName:(NSString *)imageName
{
    NSData *imageData = UIImageJPEGRepresentation(currentImage, 1); // 1為不縮放保存,取值為(0~1)
    // 獲取沙河路徑
    NSString *fullPath = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0] stringByAppendingPathComponent:imageName];
    // 將照片寫入文件
    [imageData writeToFile:fullPath atomically:YES];
}
}

完整的Demo地址.