UIAlertView不会调用功能

我有一个功能，可以让你选择如何拍照（从画廊或从相机）。如果没有“内容”（你还没有拍照），那么你可以自由地做到这一点。如果确实有内容（您已经拍了照片），那么会弹出一个对话框询问您是否确定。我已经实现了UIAlertViewDelegate，以便我可以告诉他们按哪个按钮。UIAlertView不会调用功能

当我们按OK键（按钮索引0），但功能不起作用（它确实被调用，我用调试器逐步完成）时出现问题。如果再次按下按钮，它也不会让我弹出另一个对话框。

我不知道问题出在哪里，我无法想象谷歌能够尝试找出什么。

任何帮助表示赞赏，谢谢。

-(IBAction)galleryButtonPressed:(id)sender 
{ 
    if (!mHasContent) 
    { 
     [mDelegate performSelector:@selector(galleryButtonPressed:) withObject:self]; 
    } 
    else 
    { 
     UIAlertView* warning = [[UIAlertView alloc] initWithTitle:@"Section Complete" message:@"You have already taken an image. Selecting another will overwrite it, you can select to take another image above. Are you sure you wish to continue?" delegate:self cancelButtonTitle:@"OK" otherButtonTitles: @"Cancel", nil]; 

     [warning setTag:GALLERY]; 
     [warning show]; 
     [warning release]; 
    } 
} 

-(IBAction)cameraButtonPressed:(id)sender 
{ 
    if (!mHasContent) 
    { 
     [mDelegate performSelector:@selector(captureImageButtonPressed:) withObject:self]; 
    } 
    else 
    { 
     UIAlertView* warning = [[UIAlertView alloc] initWithTitle:@"Section Complete" message:@"You have already taken an image. Selecting another will overwrite it, you can select to take another image above. Are you sure you wish to continue?" delegate:self cancelButtonTitle:nil otherButtonTitles: @"OK", @"Cancel", nil]; 

     [warning setTag:CAMERA]; 
     [warning show]; 
     [warning release]; 
    } 
} 

-(void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex 
{ 
    // If they selected OK then resend the event to take a photo or select from the gallery 
    if (buttonIndex == 0) 
    { 
     mHasContent = NO; 

     if ([alertView tag] == GALLERY) 
     { 
      [self galleryButtonPressed:mGalleryButton]; 
     } 
     else 
     { 
      [self cameraButtonPressed:mCameraButton]; 
     } 
    } 
}

我也尝试过这与onClick和willDismiss ....并没有这些工作。

来源

2012-02-27 Luke

实现这个委托方法

-(void)alertView:(UIAlertView*)alertView clickedButtonAtIndex:(NSInteger)buttonIndex

来源

2012-02-27 09:50:42 Nyx0uf

对不起，我应该说。我已经尝试过，并且还有“willDissWithButtonIndex”，而且他们都不工作。 – Luke 2012-02-27 09:52:02

尝试此方法...

-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex { 
    if (buttonIndex == 0) 
    { 
     mHasContent = NO; 

     if ([alertView tag] == GALLERY) 
     { 
      [self galleryButtonPressed:mGalleryButton]; 
     } 
     else 
     { 
      [self cameraButtonPressed:mCameraButton]; 
     } 
    } 
}

来源

2012-02-27 09:57:26 Rupesh

“Gallary”和“CAMERA”中的值是什么？它是整数或字符串 – Rupesh 2012-02-27 10:00:38

它是： #define GALLERY 1 #define CAMERA 0 – Luke 2012-02-27 10:57:29

做一件事..获取本地int temp = alertview.tag中的alertview.tag的值并将该值与CAMERA/GALLERY进行比较 – Rupesh 2012-02-27 11:00:30

而不是使用两个按钮..使用actionsheet的。

- （IBAction为）takePic：（ID）发送方 {

GroceryApplicationAppDelegate *appDelegate = (GroceryApplicationAppDelegate*)[[UIApplication sharedApplication]delegate]; 

UIActionSheet *sheet = [[UIActionSheet alloc] initWithTitle:@"" delegate:self cancelButtonTitle:@"Cancel" destructiveButtonTitle:nil otherButtonTitles:@"Take Photo",@"Choose Existing Photo",nil]; 
[sheet setDelegate:self]; 
[sheet showInView:appDelegate.window]; 
[sheet release]; 
}

- （无效）actionSheet：（UIActionSheet *）actionSheet clickedButtonAtIndex：（NSInteger的）buttonIndex {

if(buttonIndex == 0) 
{ 

    if (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) { 
     UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"" message:@"No Camera Found" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil]; 
     [alert show]; 
     [alert release]; 

     return; 
    } 

    UIImagePickerController *picker = [[UIImagePickerController alloc] init]; 
    picker.delegate = self; 
    picker.sourceType = UIImagePickerControllerSourceTypeCamera; 

    [self presentModalViewController:picker animated:YES]; 
} 

if (buttonIndex == 1) 
{ 

    UIImagePickerController *picker = [[UIImagePickerController alloc] init]; 
    picker.delegate = self; 
    picker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum; 

    [self presentModalViewController:picker animated:YES]; 
}

}

来源

2012-02-27 13:52:02 Rupesh

您可以修改此代码并根据您的项目使用它。 – Rupesh 2012-02-27 13:53:44

如果您有任何疑问，请问我 – Rupesh 2012-02-27 13:55:15

UIAlertView不会调用功能

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