背景:在 iPad 上,我有一个按钮,点击该按钮时会显示 UIActionSheet
。此操作表有 2 个选项:相机和图库。点击相机后,拉起相机,一切正常。点击图库后,假设会显示一个弹出窗口,其中包含用户的照片。
问题:在 iPad 上,UIActionSheet
的行为类似于弹出框。演示时,无法看到另一个弹出窗口。错误:由于未捕获的异常“NSGenericException”而终止应用程序,原因:“-[UIPopoverController dealloc] 在弹出窗口仍然可见时到达。
我的代码:
设置操作表
- (void)imageButtonTapped:(UIButton *)sender
{
if (_commentObject.image){
_actionSheet = [[UIActionSheet alloc] initWithTitle:@"Action" delegate:self cancelButtonTitle:@"Cancel" destructiveButtonTitle:@"Remove" otherButtonTitles:nil];
_actionSheet.tag = ACTION_IMAGE_REVIEW_TAG;
}else{
_actionSheet = [[UIActionSheet alloc] initWithTitle:@"Image Source" delegate:self cancelButtonTitle:@"Cancel" destructiveButtonTitle:nil otherButtonTitles:@"Camera", @"Gallery", nil];
_actionSheet.tag = ACTION_IMAGE_SOURCE_TAG;
}
if (_isPad) {
[_actionSheet showFromRect:_imageButton.frame inView:_scrollViewContent animated:YES];
}else{
[_actionSheet showInView:self.view];
}
}
委托(delegate)
- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
switch (actionSheet.tag) {
case ACTION_IMAGE_SOURCE_TAG:
switch (buttonIndex) {
case 0:
[self pickImage:YES];
break;
case 1:
[self pickImage:NO];
break;
default:
break;
}
break;
}
执行中
- (void)pickImage:(BOOL)fromCamera
{
if (fromCamera) {
if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]){
UIImagePickerController* cameraPickerController = [[UIImagePickerController alloc] init];
cameraPickerController.sourceType = UIImagePickerControllerSourceTypeCamera;
cameraPickerController.delegate = self;
[self presentViewController:cameraPickerController animated:YES completion:nil];
}else{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Camera Unavailable" message:@"Your Device does not support Cameras" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles: nil];
[alert show];
}
}else{
UIImagePickerController *galleryPickerController = [[UIImagePickerController alloc] init];
galleryPickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
galleryPickerController.delegate = self;
if (_isPad) {
if ([_actionSheet isVisible]) {
[_actionSheet removeFromSuperview];
UIPopoverController *imagePickerPopover = [[UIPopoverController alloc] initWithContentViewController:galleryPickerController];
[imagePickerPopover presentPopoverFromRect:_imageButton.frame inView:self.view permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
}
}else{
[self presentViewController:galleryPickerController animated:YES completion:nil];
}
}
}
问题:我尝试从 View 中删除操作表,并尝试在执行 pickImage
之前将其关闭。这些都不起作用。如何展示画廊?
最佳答案
您的问题:错误:由于未捕获的异常“NSGenericException”而终止应用程序,原因:“-[UIPopoverController dealloc] 在弹出窗口仍然可见时到达。
在 .h 文件类中创建 UIPopoverController
的对象。确保您的 UIPopoverController
的 @property 是强而不是弱。
检查这个
UIPopoverController: dealloc reached while popover is still visible
UIPopovercontroller dealloc reached while popover is still visible
关于ios - 在 iPad 上显示来自 ActionSheet 的 ImagePickerController,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/18188922/