iOS開發-iOS調用相機調用相冊【將圖片保存到本地相冊】

設置頭部代理

<UINavigationControllerDelegate, UIImagePickerControllerDelegate>

1.調用相機

檢測前置攝像頭是否可用

- (BOOL)isFrontCameraAvailable{
    return [UIImagePickerController isCameraDeviceAvailable:UIImagePickerControllerCameraDeviceFront];
}

檢測後置攝像頭是否可用

- (BOOL)isRearCameraAvailable{
    return [UIImagePickerController isCameraDeviceAvailable:UIImagePickerControllerCameraDeviceRear];
}

調用相機

///調用相機
- (void)persentImagePicker{
    if (!_imagePickerG) {
        ///初始化相機
        _imagePickerG = [[UIImagePickerController alloc]init];
        ///代理
        _imagePickerG.delegate = self;
    }
    
    // 前面的攝像頭是否可用
    if ([self isFrontCameraAvailable]) {
        _imagePickerG.sourceType = UIImagePickerControllerSourceTypeCamera;
    }
    // 後面的攝像頭是否可用
    else if ([self isFirstResponder]){
        _imagePickerG.sourceType = UIImagePickerControllerSourceTypeCamera;
    }
    else{
        [SVProgressHUD showErrorWithStatus:@"沒有相機可用~"];
        return;
    }
    ///允許拍照後裁剪
    _imagePickerG.allowsEditing = YES;
    [self.navigationController presentViewController:_imagePickerG animated:YES completion:nil];
}

2.調用相冊

///調用本地相冊
- (void)persentImagePicker{
    if (!_imagePickerG) {
        ///初始化相機
        _imagePickerG = [[UIImagePickerController alloc]init];
        ///代理
        _imagePickerG.delegate = self;
    }
    ///相冊
    _imagePickerG.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    _imagePickerG.allowsEditing = YES;
    [self.navigationController presentViewController:_imagePickerG animated:YES completion:nil];
}

3.代理事件

///取消選擇圖片（拍照）
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker{
    [picker dismissViewControllerAnimated:YES completion:nil];
}

///選擇圖片完成（從相冊或者拍照完成）
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info{
    UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];///原圖
    //獲取修剪後的圖片
    UIImage *imageUp = [info objectForKey:UIImagePickerControllerEditedImage];
}

4.將圖片保存到本地

///保存圖片到本地相冊
-(void)imageTopicSave:(UIImage *)image{
    UIImageWriteToSavedPhotosAlbum(image, self, @selector(image: didFinishSavingWithError: contextInfo:), nil);
}
- (void)image:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo{
    if (error == nil) {
        
    }
    else{
        ///圖片未能保存到本地
    }
}