从UIActionSheet按钮启动视图时，在通过导航栏后退按钮返回视图时，工具栏虽然仍然可见，但没有以前在其上的任何按钮。此错误自更新到 iOS 6 后出现，并在模拟器和仅运行 iOS 6 的设备上测试时发生。如果我注释掉隐藏工具栏的代码，UIActionSheet按钮会在返回时添加。
我正在以编程方式制作我的工具栏项目，viewWillAppear并显示UIActionSheet我通过self.navigationController.toolbar.
知道是什么导致了这个问题吗？自从 iOS 6 出现以来才发生这种情况，所以我需要考虑任何更改viewWillAppear吗？
这是从 actionSheet 推送视图的方式：
- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
if (actionSheet.tag == 2) {
if (buttonIndex == 0) {
[self dismissAllTips];
self.actionNoteAddView= [[self.storyboard instantiateViewControllerWithIdentifier:@"IDActionNoteAddView"] retain];
actionNoteAddView.note_id = 0;
actionNoteAddView.iscompleted=0;
[[NSUserDefaults standardUserDefaults] setBool:NO forKey:@"tool_tips"];
[self.navigationController pushViewController:actionNoteAddView animated:TRUE];
[actionNoteAddView release];
}else if(buttonIndex == 1){
...
这些是推送视图的视图方法：
-(void)viewWillAppear:(BOOL)animated{
[super viewWillAppear:animated];
self.navigationItem.hidesBackButton = NO;
[self.navigationController setToolbarHidden:YES];
txtcontent.layer.cornerRadius = 10.0f;
}
-(void)viewDidAppear:(BOOL)animated{
[super viewDidAppear:animated];
}
这些是使用 actionSheet 推送视图的视图的视图方法：
- (void) viewWillAppear:(BOOL)animated{
[super viewWillAppear:animated];
self.navigationItem.hidesBackButton = YES;
[self.navigationController setToolbarHidden:NO];
self.navigationController.navigationBarHidden=NO;
self.navigationController.navigationBar.barStyle = UIBarStyleBlackOpaque;
self.navigationController.navigationBar.tintColor = [UIColor colorWithRed:0.8 green:0.45 blue:0.2 alpha:1];
self.navigationController.toolbar.barStyle = UIBarStyleBlackOpaque;
self.navigationController.toolbar.tintColor = [UIColor colorWithRed:0.8 green:0.45 blue:0.2 alpha:1];
UIImage *actionButtonImage = [UIImage imageNamed:@"31-circle-plus@2x.png"];
UIBarButtonItem *actionButton = [[UIBarButtonItem alloc] initWithImage:actionButtonImage style:UIBarButtonItemStylePlain target:self action:@selector(actionPressed:)
];
UIImage *dashButtonImage = [UIImage imageNamed:@"19-gear.png"];
UIBarButtonItem *dashButton = [[UIBarButtonItem alloc] initWithImage:dashButtonImage style:UIBarButtonItemStylePlain target:self action:@selector(settingsPressed:)];
UIBarButtonItem *flexItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace
target:nil
action:nil];
NSArray *toolitems = [NSArray arrayWithObjects:dashButton, flexItem, actionButton, flexItem, nil];
[self setToolbarItems:toolitems];
self.title = @"Dashboard";
defaultProfile.text = [[NSUserDefaults standardUserDefaults] stringForKey:@"default_profile"];
BOOL dailyProcess = [[NSUserDefaults standardUserDefaults] boolForKey:@"daily_process"];
if(dailyProcess){
[[NSUserDefaults standardUserDefaults] setBool:NO forKey:@"daily_process"];
[[NSUserDefaults standardUserDefaults] synchronize];
loading = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 480)];
labelProcess = [[UILabel alloc]initWithFrame:CGRectMake(60, 105, 240, 30)];
labelProcess.text = @"Processing...";
labelProcess.backgroundColor = [UIColor clearColor];
labelProcess.textColor=[UIColor colorWithRed:0.8 green:0.45 blue:0.2 alpha:1];
[labelProcess setFont:[UIFont systemFontOfSize:20]];
loading.opaque = NO;
loading.backgroundColor = [UIColor colorWithWhite:0.0f alpha:0.6f];
indicator = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
[indicator setHidesWhenStopped:YES];
indicator.center = self.view.center;
[self.view addSubview:loading];
[self.view addSubview:indicator];
[self.view addSubview:labelProcess];
[indicator startAnimating];
}
}
-(void)viewDidAppear:(BOOL)animated{
[super viewDidAppear:animated];
CGRect frame = CGRectMake(157, 365, 10, 10);
UIView *viewToPointAt = [[UIView alloc] initWithFrame:frame];
[self.view addSubview:viewToPointAt];
BOOL willies = [[NSUserDefaults standardUserDefaults] boolForKey:@"tool_tips"];
if(willies==YES){
if(popTip == nil) {
popTip = [[[CMPopTipView alloc] initWithMessage:@"Step 1/3: This is the Action Button. You can create, view and auto-fill notes which are then added to your timeline.(Click for step 2)."] autorelease];
popTip.delegate = self;
[popTip presentPointingAtView:viewToPointAt inView:self.view animated:YES];
popTip.backgroundColor = [UIColor colorWithRed:0.8 green:0.45 blue:0.2 alpha:1];
popTip.textColor = [UIColor whiteColor];
}
}
[viewToPointAt release];
}