我研究相关的iOS 7状态 – Bar Maintain,但我在使用UI
ImagePickerController时遇到了问题.允许编辑“编辑窗口”在顶部栏显示20像素空间.
我使用了代码,首先我在info.plist中将UIViewControllerBasedStatusBarappearance设置为NO并设置委托方法：
Appdelegate.h
@property (retain,nonatomic) UIWindow *background;
Appdelegate.m
if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7) {
[application setStatusBarStyle:UIStatusBarStyleLightContent];
self.window.clipsToBounds =YES;
self.window.frame = CGRectMake(0,20,self.window.frame.size.width,self.window.frame.size.height-20);
self.window.bounds = CGRectMake(0,self.window.frame.size.height);
background = [[UIWindow alloc] initWithFrame: CGRectMake(0,20)];
background.backgroundColor =[UIColor redColor];
[background setHidden:NO];
}
在我的家庭视图控制器中没有任何效果,所以我放入了我的home viewController,一种用于更改状态栏背景颜色的方法：
-(void)viewWillLayoutSubviews{
if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7) {
self.view.clipsToBounds = YES;
CGRect screenRect = [[UIScreen mainScreen] bounds];
CGFloat screenHeight = screenRect.size.height;
self.view.frame = CGRectMake(0,self.view.frame.size.width,screenHeight-20);
self.view.bounds = CGRectMake(0,self.view.frame.size.height);
UIWindow* tempWindow = [[[UIApplication sharedApplication] windows] objectAtIndex:1];
if ([[NSUserDefaults standardUserDefaults] boolForKey:@"userIsMale"]) {
[tempWindow setBackgroundColor:[UIColor colorWithRed:(46.0/255.0) green:(134.0/255.0) blue:(255.0/255.0) alpha:1]];
}
else {
[tempWindow setBackgroundColor:[UIColor colorWithRed:(246.0/255.0) green:(26.0/255.0) blue:(113.0/255.0) alpha:1]];
}
[[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent];
}
现在,当我呈现UIImagePickerController时,允许编辑窗口显示如下：
我尝试使用此解决方案为隐藏状态栏,同时呈现UIImagePickerController：
- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated
{
[[UIApplication sharedApplication] setStatusBarHidden:YES];
}
并在ViewWillApear中显示状态条形码.
我得到了这种结果：
我在哪里做错了,我该如何解决这个问题？
解决方法
尝试一下：
-(BOOL)prefeRSStatusBarHidden { return YES; }
它会隐藏状态栏.
在iOS 7上,如果要使用setStatusBarHidden :,则需要在info.plist中将基于View控制器的状态栏外观设置为NO.
我希望它会给你一些暗示.
编辑：
我发现了问题.
这是第一次在viewWillAppear上显示homeViewController时的日志：
(lldb) po [[UIApplication sharedApplication] windows] <__NSArrayM 0x8a74560>( <UIWindow: 0x8e33360; frame = (0 20; 320 548); clipsToBounds = YES; gestureRecognizers = <NSArray: 0x8e348b0>; layer = <UIWindowLayer: 0x8e3c6e0>>,<UIWindow: 0x8c1db40; frame = (0 0; 320 20); gestureRecognizers = <NSArray: 0x8c1e170>; layer = <UIWindowLayer: 0x8c1da80>> )
这是解雇imagePicker并调用viewWillAppear后的日志：
(lldb) po [[UIApplication sharedApplication] windows] <__NSArrayM 0x8c1a700>( <UIWindow: 0x8e33360; frame = (0 0; 320 568); clipsToBounds = YES; autoresize = W+H; gestureRecognizers = <NSArray: 0x8e348b0>; layer = <UIWindowLayer: 0x8e3c6e0>>,<UIWindow: 0x8c1db40; frame = (0 0; 320 20); gestureRecognizers = <NSArray: 0x8c1e170>; layer = <UIWindowLayer: 0x8c1da80>>,<UITextEffectsWindow: 0x8c53380; frame = (0 0; 320 568); hidden = YES; opaque = NO; gestureRecognizers = <NSArray: 0x8c538a0>; layer = <UIWindowLayer: 0x8c53520>> )
默认窗口大小已更改.这就是状态栏无法显示的原因.
我编辑了这样的代码,它对我有用：
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view,typically from a nib.
// [[UIApplication sharedApplication] setStatusBarHidden:YES];
if(OVER_IOS7){
[self.navigationController.navigationBar setTranslucent:NO];
}
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// dispose of any resources that can be recreated.
}
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
[[UIApplication sharedApplication] setStatusBarHidden:NO withAnimation:UIStatusBaranimationSlide];
}
-(void)viewWillLayoutSubviews{
if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7) {
self.view.clipsToBounds = YES;
CGRect screenRect = [[UIScreen mainScreen] bounds];
CGFloat screenHeight = screenRect.size.height;
self.view.frame = CGRectMake(0,screenHeight-20);
self.view.bounds = CGRectMake(0,self.view.frame.size.height);
UIWindow *defaultwindow = [[[UIApplication sharedApplication] windows] objectAtIndex:0];
defaultwindow.frame = CGRectMake(0,320,548);
defaultwindow.bounds = CGRectMake(0,548);
UIWindow* tempWindow = [[[UIApplication sharedApplication] windows] objectAtIndex:1];
if ([[NSUserDefaults standardUserDefaults] boolForKey:@"userIsMale"]) {
[tempWindow setBackgroundColor:[UIColor colorWithRed:(46.0/255.0) green:(134.0/255.0) blue:(255.0/255.0) alpha:1]];
}
else {
[tempWindow setBackgroundColor:[UIColor colorWithRed:(246.0/255.0) green:(26.0/255.0) blue:(113.0/255.0) alpha:1]];
}
[[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent];
}
}
- (IBAction)showImagePicker:(id)sender
{
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
[picker setSourceType:UIImagePickerControllerSourceTypeSavedPhotosAlbum];
[self presentViewController:picker animated:YES completion:^{
[[UIApplication sharedApplication] setStatusBarHidden:YES withAnimation:UIStatusBaranimationSlide];
}];
}