iOS 7 status bar like iOS 6

问题:

I have an app with a support landscape and portrait mode. And I need the same behavior status bar like on iOS 6. What is the simplest way to do this?

I've tried the solutions in Stack Overflow question iOS 7 status bar back to iOS 6 style?, but it doesn't work. My subview depend on the view size, and my view doesn't stretch correctly. I don't want to update my XIB files; I simply want to add something that helps me. I don't know what it may be (hack or prayers).

回答1:

You can try writing this in your ViewWillappear or DidAppear. Here we are shifting the view frame 20 pixels down.

CGRect frame = self.view.frame;
frame.origin.y = 20;

if (self.view.frame.size.height == 1024 || 
    self.view.frame.size.height == 768)
{
    frame.size.height -= 20;
}

self.view.frame = frame;

This will work, but however this is not a very good idea. You can also change the text colour of the status bar to light or dark depending on your app background by calling the following method if it helps.

-(UIStatusBarStyle)preferredStatusBarStyle
{
     return UIStatusBarStyleLightContent; // For light status bar

     return UIStatusBarStyleDefault // For Dark status bar
}

回答2:

If you are on Xcode 5 and you are installing in iOS 7 then sorry, this will not happen (as far as I know).

If you want to see the status bar on iOS 7 like iOS 6 than open your project in Xcode 4.x.x and install in iOS 7. One problem with this approach I found is that sometimes Xcode 4.x.x doesn't recognise an iOS 7 device.

But if your Xcode 4.x.x can show your iOS 7 device then it will work.

The .api generated from Xcode 4.x.x will work in both iOS 6 and iOS 7, but you will not get extra space (of the status bar) on iOS 7 and the new look of keyboard, picker, switch, etc. But yes, you will get the new UIAlertView (I don't know why this is new and the other controls are old.)

I hope we will soon get a better solution in Xcode 5 for this.

UPDATE:

I found the way to run the app from Xcode 5 as Xcode 4. This is just matter of the base SDK. If you want to built as Xcode 4 (iOS 6 SDK) from Xcode 5 then do the following.

1. Close Xcode 4 and 5.

2. In Xcode 4 Go to

   /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs

3. Here you will find iPhoneOS6.1.sdk. Copy this folder. And now go in Xcode 5 on the same path. In Xcode 5, you will find iPhoneOS7.0.sdk. Paste iPhoneOS6.1.sdk with it.

4. Now close the Finder and launch Xcode 5. Go to project target setting -> Build Setting and find Base SDK. Select iOS 6.1 as Base SDK. This will also work for 6.0. You just need to find iPhoneOS6.0.sdk.

5. Now you will see the device name twice in the run dropdown box. One for SDK 7.0 and one for SDK 6.1. So now you can run both ways with iOS 6 SDK and iOS 7 SDK.

I hope this will help someone.

回答3:

I recently had to solve a similar problem, and I approached it in a slightly different way...

The approach was to use an extra view controller that acted as a container view controller for what was originally my rootViewController. First, i set up a container like this:

_containerView = [[UIView alloc] initWithFrame:[self containerFrame]];
_containerView.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
_containerView.clipsToBounds = YES;

[self.view addSubview:_containerView];
[self.view setBackgroundColor:[UIColor blackColor]];

[UIApplication.sharedApplication setStatusBarStyle:UIStatusBarStyleLightContent animated:NO];

where the containerFrame was defined like this:

- (CGRect)containerFrame
{
    if ([MyUtilityClass isSevenOrHigher])
    {
        CGFloat statusBarHeight = [MyUtility statusBarHeight]; //20.0f
        return CGRectMake(0, statusBarHeight, self.view.bounds.size.width, self.view.bounds.size.height - statusBarHeight);
    }

    return self.view.bounds;
}

Finally, I added what was originally my rootViewController as a childViewController of the new one:

//Add the ChildViewController
self.childController.view.frame = self.containerView.bounds;
self.childController.view.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
[self addChildViewController:self.childController];
[self.containerView addSubview:self.childController.view];
[self.childController didMoveToParentViewController:self];

Things to note: - Modal view controllers will still be presented in the iOS7 style, so I still have to account for that somehow.

Hope this helps someone!

回答4:

This Guide helps me.

http://www.doubleencore.com/2013/09/developers-guide-to-the-ios-7-status-bar/

The most robust way to handle the 20 point size difference is Auto Layout.

If you aren’t using Auto Layout, Interface Builder provides you with tools to handle the screen size difference between iOS 7 and the older versions. When Auto Layout is turned off, you will notice an area in the sizing tab of the utility area (right pane) of Interface Builder that allows you to set iOS 6/7 Deltas.

回答5:

1) It's a hack, but it works!

Use it if you doesn't use UIAlertView or KGStatusBar!!!

#import <objc/runtime.h>

@interface UIScreen (I_love_ios_7)
- (CGRect)bounds2;
- (CGRect)boundsForOrientation:(UIInterfaceOrientation)orientation;
@end

@implementation UIScreen (I_love_ios_7)
- (CGRect)bounds2
{
    return [self boundsForOrientation:[[UIApplication sharedApplication] statusBarOrientation]];
}

- (CGRect)boundsForOrientation:(UIInterfaceOrientation)orientation
{
    CGRect resultFrame = [self bounds2];
    if(UIInterfaceOrientationIsLandscape(orientation))
        resultFrame.size.width -= 20;
    else
        resultFrame.size.height -= 20;
    return resultFrame;
}
@end

void Swizzle(Class c, SEL orig, SEL new)
{
    Method origMethod = class_getInstanceMethod(c, orig);
    Method newMethod = class_getInstanceMethod(c, new);
    if(class_addMethod(c, orig, method_getImplementation(newMethod), method_getTypeEncoding(newMethod)))
        class_replaceMethod(c, new, method_getImplementation(origMethod), method_getTypeEncoding(origMethod));
    else
        method_exchangeImplementations(origMethod, newMethod);
}


@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{

    if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7) {
        Swizzle([UIScreen class], @selector(bounds2), @selector(bounds));
        [application setStatusBarStyle:UIStatusBarStyleLightContent];
        self.window.clipsToBounds =YES;

        [[NSNotificationCenter defaultCenter] addObserver:self
                                                 selector:@selector(applicationDidChangeStatusBarOrientation:)
                                                     name:UIApplicationWillChangeStatusBarOrientationNotification
                                                   object:nil];
        NSDictionary* userInfo = @{UIApplicationStatusBarOrientationUserInfoKey : @([[UIApplication sharedApplication] statusBarOrientation])};
        [[NSNotificationCenter defaultCenter] postNotificationName:UIApplicationWillChangeStatusBarOrientationNotification
                                                            object:nil
                                                          userInfo:userInfo];
    }

    return YES;
}

- (void)applicationDidChangeStatusBarOrientation:(NSNotification *)notification
{
    UIInterfaceOrientation orientation = [[notification.userInfo objectForKey: UIApplicationStatusBarOrientationUserInfoKey] intValue];
    CGSize size = [[UIScreen mainScreen] boundsForOrientation:orientation].size;
    int w = size.width;
    int h = size.height;
    float statusHeight = 20.0;
    switch(orientation){
        case UIInterfaceOrientationPortrait:
            self.window.frame =  CGRectMake(0,statusHeight,w,h);
            break;
        case UIInterfaceOrientationPortraitUpsideDown:
            self.window.frame =  CGRectMake(0,0,w,h);
            break;
        case UIInterfaceOrientationLandscapeLeft:
            self.window.frame =  CGRectMake(statusHeight,0,w,h);
            break;
        case UIInterfaceOrientationLandscapeRight:
            self.window.frame =  CGRectMake(0,0,w,h);
            break;
    }
}
@end

2) Create category, and always use contentView instead of view

@interface UIViewController(iOS7_Fix)
@property (nonatomic, readonly) UIView* contentView;
- (void)updateViewIfIOS_7;
@end

@implementation UIViewController(iOS7_Fix)
static char defaultHashKey;
- (UIView *)contentView
{
    return objc_getAssociatedObject(self, &defaultHashKey)?: self.view;
}

- (void)setContentView:(UIView *)val
{
    objc_setAssociatedObject(self, &defaultHashKey, val, OBJC_ASSOCIATION_RETAIN_NONATOMIC) ;
}

- (void)updateViewIfIOS_7
{
    if([[[UIDevice currentDevice] systemVersion] floatValue] < 7 || objc_getAssociatedObject(self, &defaultHashKey))
        return;

    UIView* exchangeView = [[UIView alloc] initWithFrame:self.view.bounds];
    exchangeView.autoresizingMask = self.view.autoresizingMask;
    exchangeView.backgroundColor = [UIColor blackColor];

    UIView* view = self.view;
    if(self.view.superview){
        [view.superview addSubview:exchangeView];
        [view removeFromSuperview];
    }
    [exchangeView addSubview:view];
    self.view = exchangeView;

    CGRect frame = self.view.bounds;
    frame.origin.y += 20.0;
    frame.size.height -= 20.0;
    view.frame = frame;
    view.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;

    [self setContentView:view];
}

In every UIViewController:

- (void)viewDidLoad
{
    [super viewDidLoad];
    [self updateViewIfIOS_7];
    UILabel* lab = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 130, 30)];
    lab.backgroundColor = [UIColor yellowColor];
    [self.contentView addSubview:lab];
    //...
}