更新到iOS 8.0 SDK后,我现在在尝试从UITableViewCell
:中呈现UIImagePickerController
时出错
*** Assertion failure in -[PartsSearchViewController
_presentViewController:withAnimationController:completion:],
/SourceCache/UIKit/UIKit-3318.0.1/UIViewController.m:5726
*** Terminating app due to uncaught exception
'NSInternalInconsistencyException',
reason: 'The specified modal presentation style doesn't
have a corresponding presentation controller.'
我的UITableViewCell
"PartCell"是这样声明的:
@interface PartCell : UITableViewCell <UIImagePickerControllerDelegate>
它在下面的PartCell的presentViewController
行失败:
- (IBAction)takeAuditImageClicked:(id)sender {
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.delegate = (id)self;
picker.allowsEditing = YES;
picker.modalPresentationStyle = UIModalPresentationNone;
picker.sourceType = UIImagePickerControllerSourceTypeCamera;
// FAILING ON THE LINE BELOW:
[[UIViewController topMostController] presentViewController:picker animated:YES completion:NULL];
}
以下是生成单元格的UIViewController
"PartSearchViewController"的代码:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"partCell";
UINib *nib = [UINib nibWithNibName:@"PartCell" bundle:nil];
[tableView registerNib:nib forCellReuseIdentifier:CellIdentifier];
PartCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];// forIndexPath:indexPath];
if (cell == nil)
{
cell = [[PartCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
[self fetchedResultsController:[self fetchedResultsControllerForTableView:tableView] configureCell:cell atIndexPath:indexPath];
return cell;
}
在查看了UIViewController
和UIImagePickerController
文档之后,我不知道它发生了什么变化,导致代码现在失败了。
出现问题
picker.modalPresentationStyle = UIModalPresentationNone;
注释行或将演示文稿样式选项更改为任何其他值都不会引发错误。
我猜8.0之前的SDK只是忽略了这个设置,并默认为UIModalPresentationFullScreen,但这绝对是猜测。如果有人有更好的答案,我会做相应的标记!
来自苹果文档:
UIModalPresentation
一种非模态的观点陈述或否定。
在iOS 7.0及更高版本中可用。
(在modalPresentationStyle
可用的七个演示风格选项中,UIModalPresentationNone
是唯一抛出上述错误的选项。)