打开本地相册并添加到视图

- (void)viewDidLoad {
    [super viewDidLoad];
    self.title = @"上传壁纸";
    // 点击UIButton AddWallpaper 就是打开相册添加图片
    [_AddWallpaper addTarget:self action:@selector(AddWallpaperClick) forControlEvents:UIControlEventTouchUpInside];
    
    // 点击UIButton UpWallPaper 就是上传图片
    [_UpWallpaper addTarget:self action:@selector(UpWallpaperClick) forControlEvents:UIControlEventTouchUpInside];
}

- (void)AddWallpaperClick {
    
    UIAlertController *alertController = [UIAlertController alertControllerWithTitle:nil message:@"请选择图片" preferredStyle:UIAlertControllerStyleActionSheet];
    
    UIAlertAction *OKAction = [UIAlertAction actionWithTitle:@"打开相册" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        // 打开相册
        [self open];
    }];
    
    
    UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:nil];
    
    [alertController addAction:OKAction];
    [alertController addAction:cancelAction];
    
    [self presentViewController:alertController animated:YES completion:nil];
    
    
}

- (void)open {
    // 1.判断相册是否可以打开
    if (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary]) return;
    // 2. 创建图片选择控制器
    UIImagePickerController *ipc = [[UIImagePickerController alloc] init];
    /**
     typedef NS_ENUM(NSInteger, UIImagePickerControllerSourceType) {
     UIImagePickerControllerSourceTypePhotoLibrary, // 相册
     UIImagePickerControllerSourceTypeCamera, // 用相机拍摄获取
     UIImagePickerControllerSourceTypeSavedPhotosAlbum // 相簿
     }
     */
    // 3. 设置打开照片相册类型(显示所有相簿)
    ipc.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    // ipc.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
    // 照相机
    // ipc.sourceType = UIImagePickerControllerSourceTypeCamera;
    // 4.设置代理
    ipc.delegate = self;
    // 5.modal出这个控制器
    [self presentViewController:ipc animated:YES completion:nil];
}

#pragma mark -- <UIImagePickerControllerDelegate>--
// 获取图片后的操作
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info
{
    // 销毁控制器
    [picker dismissViewControllerAnimated:YES completion:nil];
    
    // 设置图片
    _UpImage.image = info[UIImagePickerControllerOriginalImage];
}

- (void)UpWallpaperClick {
    
}

• 这里是上传到后台数据，但是由于后台暂时没有给数据，就写成这样

+ (void)uploadImageWithImage:(UIImage *)image pid:(NSString *)pid success:(void (^)(id responseObject))success failureHandler:(void(^)(NSError *error)) failure{
    //加载提示菊花
    MBProgressHUD *hud;
    hud.label.text = NSLocalizedString(@"加载中...", @"HUD loading title");
    /*
     此段代码如果需要修改，可以调整的位置
     1. 把upload.php改成网站开发人员告知的地址
     2. 把file改成网站开发人员告知的字段名
     */
    
    //AFN3.0+基于封住HTPPSession的句柄x
    AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
    
//    NSDictionary *dict = @{@"username":@"Saup"};
    
    [manager POST:@"" parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData>  _Nonnull formData) {
        NSData *data = UIImagePNGRepresentation(image);
        // 在网络开发中，上传文件时，是文件不允许被覆盖，文件重名
        // 要解决此问题，
        // 可以在上传时使用当前的系统事件作为文件名
        NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
        // 设置时间格式
        formatter.dateFormat = @"yyyyMMddHHmmss";
        NSString *str = [formatter stringFromDate:[NSDate date]];
        NSString *fileName = [NSString stringWithFormat:@"%@.png", str];
        
        //上传
        /*
         此方法参数
         1. 要上传的[二进制数据]
         2. 对应网站上[upload.php中]处理文件的[字段"file"]
         3. 要保存在服务器上的[文件名]
         4. 上传文件的[mimeType]
         */
       [formData appendPartWithFileData:data name:@"file" fileName:fileName mimeType:@"image/png"];
    
    } progress:^(NSProgress * _Nonnull uploadProgress) {

        //上传进度
        // @property int64_t totalUnitCount;     需要下载文件的总大小
        // @property int64_t completedUnitCount; 当前已经下载的大小
        //
        // 给Progress添加监听 KVO
        NSLog(@"%f",1.0 * uploadProgress.completedUnitCount / uploadProgress.totalUnitCount);

    } success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
        //上传成功时的回调
        [hud hideAnimated:YES];
    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
        //        //失败时的回调
        [hud hideAnimated:YES];
    }];
    
}