為 UIImagePickerControllerSourceTypeCamera 獲取 SIGABRT

Question

我正在嘗試制作一個非常簡單的 iphone 應用程序來顯示設備的實時相機視圖，並添加了我通過研究發現的以下代碼。

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

imagePicker.delegate = self;

imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;

imagePicker.allowsEditing = YES;

[self presentModalViewController:imagePicker animated:YES];

[imagePicker release];

}

這只會導致 SIGABRT 錯誤，我不知道該怎么做。

由於上述代碼似乎是實現相機視圖的必要條件，我是否還有其他遺漏的東西？ 沒想到簡單地加載相機視圖會給我帶來壓力......請幫幫我。

ps.我正在使用 xcode 4 順便說一句。

Answer 1

在添加之前檢查這個

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
{
//.....
}