iOS-项目中的图片上传

不积跬步,无以至千里
不积小流,无以成江海

项目中的图片上传肯定是必不可少的内容,以下先将项目中的copy下来,而且仅仅是作为头像单个文件的上传,以后有时间在详细整理下

1. 点击头像按钮

所在的视图控制器需要遵从下代理
- (void)changeImage:(UIButton *)sender {

//创建常见的下滑提示栏, 注意iOS8 才有这个控件
    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:@"从相册选择" 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. 选中图片的处理

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

3. 保存图片

-(void)saveImage:(UIImage *)image{
//传递的参数
    NSMutableDictionary *parameters = [NSMutableDictionary dictionary];
    [parameters setObject:@""forKey:@"userId"];
//图片压缩处理
    NSData *imageData = UIImageJPEGRepresentation(image, 0.5);
//利用AFNetworking上传data
    AFHTTPSessionManager * mgr = [AFHTTPSessionManager manager];
    mgr.responseSerializer.acceptableContentTypes = [NSSet setWithObject:@"text/html"];
     [mgr POST:[NSString stringWithFormat:@"%@%@",BaseAPI,@"/app/uploadPhoto"] parameters:parameters constructingBodyWithBlock:^(id  _Nonnull formData) { 
//上传时使用当前的系统事件作为文件名
        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];
//上传图片
        [formData appendPartWithFileData:imageData name:@"imgFile" fileName:fileName  mimeType:@"image/jpeg"];
            
        } progress:nil success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
//返回结果
        NSLOG(@"Success >>>>>>>>>>>>>>>>>%@", responseObject);
        } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
      }];
}

图片上传的基本功能算是有了