Question

我将自定义UIBarButton项添加到UINavigationBar作为rightbarbuttonitems。当设备转到UIBarButton时，我在landscape mode中再添加两个项目。我正在调用rotation，我正在根据设备方向正确地从UIBarbuttons数组中删除项目，但我的导航栏项目集永远不会得到更新。

如果我从肖像模式开始，它会显示它所设想的内容。当我旋转到landscape时，新项目未添加到navigation bar，反之亦然，当设备转到纵向时，额外项目将不会进入。

我不确定如何在设备旋转时更改navigationbaritems。对我而言，我正在做所有事情。

-(void)setUpOnRotation:(BOOL)toPortrait{

_searchMessage = [[UILabel alloc] initWithFrame:CGRectMake(3.0, 0, 110, 20)];
_searchMessage.numberOfLines = 2;
_searchMessage.textColor = [UIColor blackColor];
_searchMessage.font = [UIFont systemFontOfSize:8.0];
_searchMessage.text = @"";

_searchBar = [[UISearchBar alloc] initWithFrame:CGRectMake(0, 15, 130, 25)];
_searchBar.delegate = self;
_searchBar.showsCancelButton = NO;
UIBarButtonItem* doneButton = [BarButtons doneButtonWithTarget:self action:@selector(cancel)];
UIBarButtonItem *searchActivityItem = [[UIBarButtonItem alloc] initWithCustomView:_searchMessage];
UIBarButtonItem *searchItem = [[UIBarButtonItem alloc] initWithCustomView:_searchBar];
UIBarButtonItem *in = [BarButtons nativeButtonNamed:@"In"
                                                  title:@"In"
                                                  target:self
                                                  action:@selector(In)];
UIBarButtonItem *out = [BarButtons nativeButtonNamed:@"Out"
                                                  title:@"Out"
                                                  target:self
                                                  action:@selector(Out)];


NSMutableArray *itemsSet;
itemsSet = [NSMutableArray arrayWithObjects:in,
            out,
            searchItem,
            searchActivityItem,
            doneButton, nil];
if (toPortrait) {
    if ([itemsSet containsObject:searchItem] || [itemsSet containsObject:searchActivityItem]) {
        [itemsSet removeObject:searchActivityItem];
        [itemsSet removeObject:searchItem];
    }
 }


[_searchBar release];
[searchItem release];
[_searchActivity release];
[_searchMessage release];
[searchActivityView release];


self.navigationItem.rightBarButtonItems = itemsSet;
}


- (void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration
{
     [self setUpOnRotation:UIInterfaceOrientationIsPortrait(toInterfaceOrientation)];
}   -(void)viewWillAppear:(BOOL)animated{
  [super viewWillAppear:animated];
  [self.navigationController setNavigationBarHidden:NO animated:animated];
  [self setUpOnRotation:UIInterfaceOrientationIsPortrait(self.interfaceOrientation)];}

注意：setUpOnRotaion方法是从willAnimateRotationToInterfaceOrientation和viewWillAppear调用UIInterfaceOrientationIsPortrait(self.intefaceOrientation)，它确实给了我正确的结果。我已经调试了。

Answer 1

在willAnimateRotationToInterfaceOrientation中更改方向检查

    if([uidevice orientaiton]statusbarorientation]){
    self.naviogationite.rightbarbuttonitems =  @[btn1,btn2,btn3];
    }
    else{
    self.naviogationite.rightbarbuttonitems =  @[abtn1,abtn2,abnt3];
    }
    u can do like this

can u do like this

NSMutableArray *itemsSet;

if(!toPortrait){
itemsSet = [NSMutableArray arrayWithObjects:in,
            out,
            searchItem,
            searchActivityItem,
            doneButton, nil];
}
if (toPortrait) {
  itemsSet = [NSMutableArray arrayWithObjects:in,
            out,
            doneButton, nil];
}

在设备旋转时更改导航栏中的项目

1 个答案: