Question

这是我的 didFinishLaunchingWithOptions ：
目前我的应用程序仅适用于iPhone，但我想要这两种（通用）。

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    playerScreenViewController *playerScreen=[[playerScreenViewController alloc] initWithNibName:@"playerScreenViewController" bundle:nil];
    UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:playerScreen];
    self.window.rootViewController = navigationController;
    [[UIApplication sharedApplication] setStatusBarHidden:YES];
    self.window.backgroundColor = [UIColor grayColor];
    [self.window makeKeyAndVisible];
    return YES;
}

我不知道如何在appdelegate中使用这个条件：

if ([UIDevice currentDevice].userInterfaceIdiom == UIUserInterfaceIdiomPad) {
    // iPad
} else {
    // iPhone
}

Answer 1

我在代码中可以看到您使用Xib playerScreenViewController。现在您需要为iPad环境创建Xib。

然后把你的代码放在这样：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
        self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];

        playerScreenViewController *playerScreen;
        if ([UIDevice currentDevice].userInterfaceIdiom == UIUserInterfaceIdiomPad) {
            // iPad
            playerScreen=[[playerScreenViewController alloc] initWithNibName:@"playerScreenViewController_iPad" bundle:nil];

        } else {
            // iPhone
            playerScreen=[[playerScreenViewController alloc] initWithNibName:@"playerScreenViewController" bundle:nil];

        }

        UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:playerScreen];
        self.window.rootViewController = navigationController;
        [[UIApplication sharedApplication] setStatusBarHidden:YES];
        self.window.backgroundColor = [UIColor grayColor];
        [self.window makeKeyAndVisible];
        return YES;
    }

观察此行

playerScreen=[[playerScreenViewController alloc] initWithNibName:@"playerScreenViewController_iPad" bundle:nil];

此处您必须为iPad环境传递Xib名称。

Answer 2

轻松解决我的问题。
将这两种方法放在 Helper Class 这里我使用＆＃34; CommonUtils ＆＃34;。

+(BOOL)isiPad
{
    if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)
    {
        return YES;
    }
    else
    {
        return NO;
    }
}

+(NSString *)loadXIBBasedOnDevice:(NSString *)viewControllerName
{
    NSString *strReturn = @"";
    if([CommonUtils isiPad])
    {
        strReturn = [NSString stringWithFormat:@"%@-iPad",viewControllerName];
    }
    else
    {
        strReturn = viewControllerName;
    }
    NSLog(@"%@",strReturn);
    return strReturn;
}

并将其置于 Viewcontroller＆＃39> 方法，无论您是否需要检查：

ViewController *viewController = [[ViewController alloc] initWithNibName:[CommonUtils loadXIBBasedOnDevice:@"ViewController"] bundle:nil];
ViewController.navigationController.navigationBarHidden=NO;
[self.navigationController pushViewController:viewController animated:YES];

Answer 3

也可以在不检查设备的if条件的情况下加载xib文件。

Apple已经提供此功能。你必须以这种格式给出xib文件名。

playerScreenViewController~iphone.xib // iPhone
playerScreenViewController~ipad.xib // iPad

此语句会根据您的设备自动获取正确的xib：

    playerScreenViewController *playerScreen=[[playerScreenViewController alloc] initWithNibName:@"playerScreenViewController" bundle:nil];

如何在appdelegate中为xib检查设备是ipad还是iphone？

3 个答案: