iPhone 相机和图像选择器

Question

我发现了很多关于使用 UIImagePickerController 让用户从照片应用程序的数据中选择他们想要的图像的信息。我想知道如何在 3.0 上创建相同的效果，因为很多旧代码似乎不再有效。此外，我希望用户能够从同一个弹出窗口中拍摄新照片。

感谢您的帮助！

Answer 1

在 3.0 中工作，和以前一样；我不相信有任何变化。我只是分配/初始化一个 UIImagePickerController，然后将它传递给 presentModalViewController，如下所示：

- (void) chooseImageFromLibrary {
    if( ![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary] ) return;

    UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];
    imagePickerController.delegate = self;
    imagePickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    imagePickerController.allowsImageEditing = YES;
    [self presentModalViewController:imagePickerController animated:YES];
}

- (void) chooseImageFromCamera {
    if( ![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera] ) return;

    UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];
    imagePickerController.delegate = self;
    imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera;
    imagePickerController.allowsImageEditing = YES;
    [self presentModalViewController:imagePickerController animated:YES];
}

也实现委托方法：

- (void)imagePickerController:(UIImagePickerController *)picker 
        didFinishPickingImage:(UIImage *)image 
                  editingInfo:(NSDictionary *)editingInfo {
    // Do something with the image here.

    [[picker parentViewController] dismissModalViewControllerAnimated:YES];
}

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {
    [[picker parentViewController] dismissModalViewControllerAnimated:YES];
}