Question

我在AppDelegate类中创建一个TabBar VC，通过[[UIScreen mainScreen] bounds]设置窗口框架。由于我显示状态栏，因此高度应为460，但它似乎为480.如果我手动将高度设置为460，则会在标签的底部切断触摸识别。以下是代码

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
UIColor *brownNavBarColor = [[UIColor alloc] initWithRed:0.78f green:0.56f blue:0.06f alpha:1.0f];
[application setStatusBarHidden:NO];

CGRect windowRect = [[UIScreen mainScreen] bounds];
self.window = [[UIWindow alloc] initWithFrame:windowRect];

CGRect appFrame = [[UIScreen mainScreen] applicationFrame];

NSLog(@" appFrame %f", appFrame.origin.y);
NSLog(@" appFrame %f", appFrame.size.height);

NSLog(@" window.frame %f", self.window.frame.origin.y);
NSLog(@" window.frame %f", self.window.frame.size.height);

NSLog(@" window.bounds %f", self.window.bounds.origin.y);
NSLog(@" window.bounds %f", self.window.bounds.size.height);

[self.window makeKeyAndVisible];

self.ingredientTabVC2 = [[NewIngredientViewController alloc] initWithNibName:nil bundle:NULL];
self.ingredientNC2 = [[UINavigationController alloc] initWithRootViewController:self.ingredientTabVC2];
[self.ingredientNC2.navigationBar setTintColor:brownNavBarColor];

self.ingredientTabVC3 = [[IngredientTabViewController alloc] initWithNibName:nil bundle:NULL];
self.ingredientNC3 = [[UINavigationController alloc] initWithRootViewController:self.ingredientTabVC3];
[self.ingredientNC3.navigationBar setTintColor:brownNavBarColor];

self.tabBarController = [[UITabBarController alloc] initWithNibName:nil bundle:NULL];
self.tabBarController.viewControllers = [[NSArray alloc] initWithObjects: self.ingredientNC2, self.ingredientNC3, nil];


[self.window setRootViewController:self.tabBarController];
return YES;
}

这给出了日志输出

2013-02-12 23:04:21.867 SingleTest[24221:c07]  appFrame 20.000000
2013-02-12 23:04:21.868 SingleTest[24221:c07]  appFrame 460.000000
2013-02-12 23:04:21.869 SingleTest[24221:c07]  window.frame 0.000000
2013-02-12 23:04:21.870 SingleTest[24221:c07]  window.frame 480.000000
2013-02-12 23:04:21.870 SingleTest[24221:c07]  window.bounds 0.000000
2013-02-12 23:04:21.871 SingleTest[24221:c07]  window.bounds 480.000000

有人可以解释这种差异背后的原因吗？

Answer 1

来自UIScreen的文档：

applicationFrame：

此属性包含屏幕边界减去状态栏占用的区域（如果可见）。使用此属性是检索应用程序初始窗口大小的推荐方法。矩形以点数指定。

界限：

包含屏幕的边界矩形，以磅为单位。（只读）

bounds包含状态栏，applicationFrame没有。

另请注意，applicationFrame的{{1}}来源为y。

您希望主窗口填满屏幕。当您设置窗口20时，它会自动调整为rootViewController。

当applicationFrame高度为460时，为什么窗口480的高度为？

1 个答案: