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我在使用操作手冊中的ios攝像頭時遇到了一個尷尬的問題：當用戶觸摸「圖片按鈕」時，操作手冊會顯示兩個選項（要使用照片庫中的照片或用相機拍照）。iPhone攝像頭沒有顯示
無論我選擇什麼選項，什麼都不會發生，但是當我再次選擇媒體類型時，它可以工作。
貝婁是我的代碼：
- (IBAction)selectMediaType: (id)sender {
[appDelegate hideTabBar];
UIActionSheet *action = [[UIActionSheet alloc]
initWithTitle: nil
delegate:self
cancelButtonTitle:@"Fechar"
destructiveButtonTitle: nil
otherButtonTitles:@"Galeria", @"Tirar Foto", nil];
[action showFromTabBar: appDelegate.tabController.tabBar];
}
- (void) actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
if (buttonIndex == 0) {
UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
NSArray *mediaTypes = [NSArray arrayWithObjects:(NSString *)kUTTypeImage, nil];
imagePicker.delegate = self;
imagePicker.hidesBottomBarWhenPushed = YES;
imagePicker.mediaTypes = mediaTypes;
imagePicker.allowsEditing = NO;
imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
[self presentModalViewController:imagePicker animated:YES];
imagePicker.hidesBottomBarWhenPushed = YES;
} else if (buttonIndex == 1) {
if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
NSArray *mediaTypes = [NSArray arrayWithObjects:(NSString *)kUTTypeImage, nil];
imagePicker.delegate = self;
imagePicker.mediaTypes = mediaTypes;
imagePicker.allowsEditing = YES;
imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
imagePicker.cameraCaptureMode = UIImagePickerControllerCameraCaptureModePhoto;
[self presentModalViewController:imagePicker animated:YES];
} else {
UIAlertView *alert = [[UIAlertView alloc]
initWithTitle:@""
message:@"Your device does not support this feature!"
delegate:self
cancelButtonTitle:@"OK"
otherButtonTitles: nil];
[alert show];
[alert release];
}
} else {
[appDelegate showTabBar];
}
}
- (void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
UIImage *image;
NSURL *mediaURL;
mediaURL = (NSURL *) [info valueForKey:UIImagePickerControllerMediaURL];
if (mediaURL == nil) {
image = (UIImage *) [info valueForKey:UIImagePickerControllerOriginalImage];
}
imageView.image = image;
[picker dismissModalViewControllerAnimated:YES];
[appDelegate showTabBar];
}
- (void) imagePickerControllerDidCancel:(UIImagePickerController *)picker {
[picker dismissModalViewControllerAnimated:YES];
[appDelegate showTabBar];
}
誰能幫助我？
謝謝。