使用UIImageWriteToSavedPhotosAlbum将图像保存到相机胶卷

Question

我想用照相机捕获照片后用相机保存带有按钮的照片，但我不知道为什么我的照片无法在照片库保存！

这里是我的代码：

-(IBAction)savePhoto{ 

    UIImageWriteToSavedPhotosAlbum(img.image,nil, nil, nil); 

} 

-(IBAction)takePic { 

    ipc = [[UIImagePickerController alloc]init]; 
    ipc.delegate = self; 
    ipc.sourceType = UIImagePickerControllerSourceTypeCamera; 
    [self presentModalViewController:ipc animated:YES]; 

} 

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info { 

    img.image = [[info objectForKey:UIImagePickerControllerOriginalImage]retain]; 
    [[picker parentViewController]dismissModalViewControllerAnimated:YES]; 
    [picker release]; 
} 

变量名ipc是UIImagePickerController和img是UIIMageView。

我的问题是什么？

Answer 1

首先请确保您致电savePhoto。然后你可以添加一个断言来检查图像是否为零：

- (IBAction) savePhoto { 
    NSParameterAssert(img.image); 
    UIImageWriteToSavedPhotosAlbum(img.image, nil, nil, nil); 
}