我正在将我的应用更新到iOS 8并尝试使用UIPickerView
UIActionSheet
重新创建UIAlertController
,如here所述。使用Nada Gamal的答案,我能够重新创建功能,但UIPickerView
仅在标签栏内响应(即使标签栏隐藏在选择器视图后面)。标签栏控制器是根视图控制器。
-(void)loadPickerView{
UIPickerView *pickerView = [[UIPickerView alloc] initWithFrame:CGRectMake(0.0, 44.0, 0.0, 0.0)];
pickerView.showsSelectionIndicator = YES;
pickerView.dataSource = self;
pickerView.delegate = self;
pickerView.backgroundColor = [UIColor whiteColor];
[pickerView selectRow:pickerViewRow inComponent:0 animated:NO];
UIToolbar *pickerToolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, 44)];
pickerToolbar.tintColor = self.navigationController.navigationBar.tintColor;
NSMutableArray *barItems = [[NSMutableArray alloc] init];
UIBarButtonItem *flexSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:self action:nil];
[barItems addObject:flexSpace];
UIBarButtonItem *doneBtn = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(dismissActionSheet)];
[barItems addObject:doneBtn];
[pickerToolbar setItems:barItems animated:YES];
UIAlertController * searchActionSheet=[UIAlertController alertControllerWithTitle:@"" message:@"" preferredStyle:UIAlertControllerStyleActionSheet];
[ searchActionSheet.view setBounds:CGRectMake(8, 208, self.view.frame.size.width, pickerView.frame.size.height+pickerToolbar.frame.size.height)];
[searchActionSheet.view addSubview:pickerToolbar];
[searchActionSheet.view addSubview:pickerView];
[self presentViewController:searchActionSheet animated:YES completion:nil];
}
最后一行中的presentViewController
似乎是个问题。我尝试了很多不同的方法让pickerView在标签栏区域之外做出响应,包括:
self
self.tabBarController
self.navigationController
(pickerView根本没有显示)[[UIApplication sharedApplication] keyWindow].rootViewController
另一种选择是为此创建一个单独的视图控制器,但我担心这不会起作用,因为UIAlertController
是UIViewController
的子类,但也许这是一个问题将子视图添加到UIAlertController
。