当我在iOS9中创建一个自定义UIWindow时,窗口会在屏幕上可见,但状态栏会突然消失。当窗口被隐藏时,状态栏会再次出现。以下是使用Xcode7 beta5在iOS9上获得的2个屏幕截图。在自定义窗口隐藏时的状态栏:
。在自定义窗口可见时的状态栏:
(整个屏幕向上移动)。这是我正在使用的代码(在iOS8上运行良好):
![Status bar while the custom window is hidden](https://istack.dev59.com/DEkN4.webp)
![Status bar while the custom window is visible](https://istack.dev59.com/o2Qog.webp)
#define DEBUG_SHOWENV_HEIGHT 20.0f
@interface AppDelegate ()
@property (nonatomic) UIWindow* envWindow;
@end
-(UIWindow*)envWindow
{
if (_envWindow == nil)
{
// Create the window
_envWindow = [[UIWindow alloc] initWithFrame:CGRectMake(0.0f, self.window.frame.size.height, self.window.frame.size.width, DEBUG_SHOWENV_HEIGHT)];
_envWindow.rootViewController = [[UIViewController alloc] init]; // added since iOS9 to avoid the assertion
_envWindow.userInteractionEnabled = NO;
_envWindow.windowLevel = UIWindowLevelStatusBar;
_envWindow.backgroundColor = [UIColor colorWithRed:0.243 green:0.471 blue:0.992 alpha:0.8];
// Make a label
UILabel* labelEnv = [[UILabel alloc] initWithFrame:CGRectMake(8.0f, 0.0f, _envWindow.bounds.size.width - 16.0f, DEBUG_SHOWENV_HEIGHT)];
labelEnv.font = [UIFont boldSystemFontOfSize:12.0f];
labelEnv.textColor = [UIColor whiteColor];
labelEnv.text = @"DEVELOP ENVIRONMENT";
[_envWindow addSubview:labelEnv];
}
return _envWindow;
}
// ==== in applicationDidBecomeActive
// Show the window 2 seconds then hide it.
[self.envWindow.layer removeAllAnimations];
self.envWindow.frame = CGRectMake(0.0f, self.window.frame.size.height, self.window.frame.size.width, DEBUG_SHOWENV_HEIGHT);
self.envWindow.hidden = NO;
[UIView animateWithDuration:0.25f
delay:0.0f
options:UIViewAnimationOptionCurveEaseOut
animations:^{
self.envWindow.frame = CGRectMake(0.0f, self.window.frame.size.height - DEBUG_SHOWENV_HEIGHT, self.window.frame.size.width, DEBUG_SHOWENV_HEIGHT);
}
completion:^(BOOL finished) {
if (finished)
{
[UIView animateWithDuration:0.25f
delay:2.0f
options:UIViewAnimationOptionCurveEaseOut
animations:^{
self.envWindow.frame = CGRectMake(0.0f, self.window.frame.size.height, self.window.frame.size.width, DEBUG_SHOWENV_HEIGHT);
}
completion:^(BOOL finished) {
if (finished)
{
self.envWindow.hidden = YES;
}
}];
}
}];
我会非常感激您的帮助。
UIViewController
? - NRitH