iPhone：在didFinishPickingImage中沒有獲取圖像路徑URL

我試圖從使用下面的代碼從相冊中挑選後獲取圖像路徑。但它總是將圖像路徑設置爲NULL /崩潰。是什麼原因？有人能幫助我嗎？iPhone：在didFinishPickingImage中沒有獲取圖像路徑URL

-(IBAction) LaunchAlbum :(id) sender 
{ 
    // Updated - overlay code. 
    MyAppDelegate *appDelegate = (MyAppDelegate *)[UIApplication sharedApplication].delegate; 

    appDelegate.pickerController = [[UIImagePickerController alloc] init]; 
    appDelegate.pickerController.delegate = self; 
    //appDelegate.pickerController.allowsEditing = NO; 
    //appDelegate.pickerController.mediaTypes = [NSArray arrayWithObject:@"public.image"]; 

    appDelegate.pickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary; 
    [self presentModalViewController:appDelegate.pickerController animated:YES]; 
    [ appDelegate.pickerController release]; 
} 
    - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info 
imageUrl = [info valueForKey:@"UIImagePickerControllerReferenceURL"]; // CRASH 
selectedImage = [imageUrl path]; 
    NSLog(@"selectedImage: %@", selectedImage); 
}

來源

2011-09-17 Getsy

從UIImagePickerController類參考：
editingInfo
含有任何有關編輯信息的字典。如果禁用編輯，則此參數爲零。該字典的鍵在「編輯信息鍵」中列出。

取消註釋行appDelegate.pickerController.allowsEditing = NO;
和editInfo不會爲零。

來源

2011-09-17 17:35:49

您好，我註釋掉appDelegate.pickerController.allowsEditing = NO;不過靜止圖像路徑爲空。但我確信我通過在imageview中添加圖像來獲得正確的圖像。圖像路徑URL仍爲NULL。 – Getsy

@Getsy，調試你的應用程序！檢查editInfo是否爲零。然後NSLog整個editInfo看看它有什麼。 –

它不是NULL。它是這樣給出的 - > {UIImagePickerControllerCropRect =「NSRect：{{0,0}，{147,140}}」; UIImagePickerControllerEditedImage =「」; UIImagePickerControllerMediaType =「public.image」; UIImagePickerControllerOriginalImage =「」; } – Getsy

你想：

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info 
{ 
    NSURL* imageUrl = [info valueForKey:UIImagePickerControllerMediaURL]; 
    selectedImage = [imageUrl path]; 
    NSLog(@"selectedImage: %@", selectedImage); 
}

有幾個問題，你想什麼：

imagePickerController:didFinishPickingImage:editingInfo:已經過時
鍵，如UIImagePickerControllerMediaURL都應該使用常量，不是引用作爲字符串。
你可能想UIImagePickerControllerMediaURL而不是UIImagePickerControllerReferenceURL

來源

2011-09-17 17:46:32 adpalumbo

嗨，此代碼獲取圖像路徑爲NULL。 – Getsy

誰能幫我解決這個問題？ – Getsy

UIImagePickerControllerMediaURL用於查找視頻文件路徑，而不是映像文件路徑。 – Harish

iPhone：在didFinishPickingImage中沒有獲取圖像路徑URL

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