iOS 單張及多張照片的選擇

Oranges發表於2017-12-13
iOS

一.從相簿裡面選擇圖片到App中

1.選擇單張

    1>.UIImagePickerController(自帶選擇介面的)
    2>.AssetsLibrary(選擇介面需要開發者自己搭建)
    3>.Photos(選擇介面需要開發者自己搭建)
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2.多張圖片選擇(圖片數量>2)

    1>.AssetsLibrary
    2>.Photos
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二.利用相機拍一張照片到APP

   1>.UIImagePickerController
   2>.AVcaptureSeccion.可以定義拍照介面樣式
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選擇單張照片

/// 選擇照片
- (IBAction)selectPhoto:(UIButton *)sender {
    UIAlertController *alterConroller = [UIAlertController alertControllerWithTitle:@"請選擇方式" message:nil preferredStyle:UIAlertControllerStyleActionSheet];
    UIAlertAction *cameraAction = [UIAlertAction actionWithTitle:@"照相機" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        [self openCamera];
    }];
    UIAlertAction *albumAction = [UIAlertAction actionWithTitle:@"相簿" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
        [self openAlbum];
    }];
    [alterConroller addAction:albumAction];
    [alterConroller addAction:cameraAction];
    [self presentViewController:alterConroller animated:YES completion:nil];
}
/// 開啟照相機
- (void)openCamera{
    //UIImagePickerControllerSourceTypePhotoLibrary, 從所有相簿選擇
    //UIImagePickerControllerSourceTypeCamera, //拍一張照片
    //UIImagePickerControllerSourceTypeSavedPhotosAlbum//從moments選擇一張照片
    //判斷照相機能否使用
    if (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) return;
    UIImagePickerController *picker = [[UIImagePickerController alloc] init];
    picker.sourceType = UIImagePickerControllerSourceTypeCamera;
    picker.delegate = self;
    [self presentViewController:picker animated:YES completion:nil];
}
/// 開啟相簿
- (void)openAlbum{
    //UIImagePickerControllerSourceTypePhotoLibrary, 從所有相簿選擇
    //UIImagePickerControllerSourceTypeCamera, //拍一張照片
    //UIImagePickerControllerSourceTypeSavedPhotosAlbum//從moments選擇一張照片
    UIImagePickerController *picker = [[UIImagePickerController alloc] init];
    picker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
    picker.delegate = self;
    [self presentViewController:picker animated:YES completion:nil];
}
#pragma mark - ******UIImagePickerControllerDelegate******
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info{
    [picker dismissViewControllerAnimated:YES completion:nil];
    self.imageView.image = info[UIImagePickerControllerOriginalImage];
    NSLog(@"%@",info);
}
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  • 注意事項

UIImagePickerController的代理有2個遵循2個代理<UINavigationControllerDelegate, UIImagePickerControllerDelegate>

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