不積跬步,無以至千里
不積小流,無以成江海

項目中的圖片上傳肯定是必不可少的內容,以下先將項目中的copy下來,而且僅僅是作為頭像單個文件的上傳,以后有時間在詳細整理下

1. 點擊頭像按鈕

所在的視圖控制器需要遵從下<UIImagePickerControllerDelegate>代理
- (void)changeImage:(UIButton *)sender {

//創建常見的下滑提示欄, 注意iOS8 才有這個控件
    UIAlertController  *alert = [UIAlertController alertControllerWithTitle:nil message:nil preferredStyle:(UIAlertControllerStyleActionSheet)];
    UIAlertAction  *cancelAction = [UIAlertAction actionWithTitle:@"取消" style:(UIAlertActionStyleCancel) handler:^(UIAlertAction * _Nonnull action) { }];
    UIAlertAction  *fromPhotoAction = [UIAlertAction actionWithTitle:@"從相冊選擇" style:(UIAlertActionStyleDefault) handler:^(UIAlertAction * _Nonnull action)  {
        UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
        imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
        imagePicker.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
        imagePicker.allowsEditing = YES;
        imagePicker.delegate = self;
        [self presentViewController:imagePicker animated:YES completion:nil];
    }];
    UIAlertAction  *fromCameraAction = [UIAlertAction actionWithTitle:@"拍照" style:(UIAlertActionStyleDefault) handler:^(UIAlertAction * _Nonnull action)  {
        UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
        imagePicker.delegate = self;
        imagePicker.allowsEditing = YES;
        imagePicker.modalTransitionStyle = UIModalTransitionStyleCoverVertical;
        imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
        [self presentViewController:imagePicker animated:YES completion:nil];
    }];

    [alert addAction:cancelAction];
    [alert addAction:fromCameraAction];
    [alert addAction:fromPhotoAction];
    [self presentViewController:alert animated:YES completion:nil];
}

2. 選中圖片的處理

代理方法獲取圖片
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    [picker dismissViewControllerAnimated:YES completion:nil];
    //可裁剪
    UIImage *image = [info objectForKey:UIImagePickerControllerEditedImage];
    //原圖
    //UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];
    [self performSelector:@selector(saveImage:) withObject:image afterDelay:0.5];
    
}

3. 保存圖片

-(void)saveImage:(UIImage *)image{
//傳遞的參數
    NSMutableDictionary *parameters = [NSMutableDictionary dictionary];
    [parameters setObject:@""forKey:@"userId"];
//圖片壓縮處理
    NSData *imageData = UIImageJPEGRepresentation(image, 0.5);
//利用AFNetworking上傳data
    AFHTTPSessionManager * mgr = [AFHTTPSessionManager manager];
    mgr.responseSerializer.acceptableContentTypes = [NSSet setWithObject:@"text/html"];
     [mgr POST:[NSString stringWithFormat:@"%@%@",BaseAPI,@"/app/uploadPhoto"] parameters:parameters constructingBodyWithBlock:^(id<AFMultipartFormData>  _Nonnull formData) { 
//上傳時使用當前的系統事件作為文件名
        NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
        formatter.dateFormat = @"yyyyMMddHHmmss";
        formatter.timeZone = [NSTimeZone timeZoneWithAbbreviation:@"GMT+0800"];
        NSString *str = [formatter stringFromDate:[NSDate date]];
        NSString *fileName = [NSString stringWithFormat:@"%@.jpg", str];
//上傳圖片
        [formData appendPartWithFileData:imageData name:@"imgFile" fileName:fileName  mimeType:@"image/jpeg"];
            
        } progress:nil success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
//返回結果
        NSLOG(@"Success >>>>>>>>>>>>>>>>>%@", responseObject);
        } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
      }];
}

圖片上傳的基本功能算是有了