为 UIImagePickerControllerSourceTypeCamera 获取 SIGABRT

Question

我正在尝试制作一个非常简单的 iphone 应用程序来显示设备的实时相机视图，并添加了我通过研究发现的以下代码。

    -(void)viewDidLoad{
UIImagePickerController *imagePicker =
[[UIImagePickerController alloc] init];

imagePicker.delegate = self;

imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;

imagePicker.allowsEditing = YES;

[self presentModalViewController:imagePicker animated:YES];

[imagePicker release];

}

这只会导致 SIGABRT 错误，我不知道该怎么做。

由于上述代码似乎是实现相机视图的必要条件，我是否还有其他遗漏的东西？ 没想到简单地加载相机视图会给我带来压力......请帮帮我。

ps.我正在使用 xcode 4 顺便说一句。

Answer 1

在添加之前检查这个

if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
UIImagePickerController *imagePicker =
[[UIImagePickerController alloc] init];

imagePicker.delegate = self;

imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;

imagePicker.allowsEditing = YES;

[self presentModalViewController:imagePicker animated:YES];

[imagePicker release];

}

else
{
//.....
}