objective-c - 如何将手动创建的 ViewController 链接到 TabBar 应用程序

Question

我用 ARC 创建了一个 tabBar 应用。所以默认设置会自动提供 2 个 viewControllers；

1)FirstViewController.h,FirstViewController.m;FirstViewController_iPhone.xib,FirstViewController_iPad.xib

2) SecondViewController.h, SecondViewController.m, SecondViewController_iPhone.xib, SecondViewController_iPad.xib

我想创建一个新的 View Controller “ViewController3”，但在文件创建过程中，我只能选择为 iPad 创建或仅为 iPhone 创建(选中“Targeted for iPad”)。我需要 iPhone 和 iPad xibs，就像为我创建的 FirstViewController 和 SecondViewControllers 一样。所以我决定手动创建 xib，并在没有 xib 的情况下继续创建文件。

所以在那之后我自然而然地继续手动创建 2 个新闻 xib； ThirdViewController_iPhone.xib 和 ThirdViewController_iPad.xib

我将这一行添加到原始的 AppDelegeate 文件中:

UIViewController *viewController1, *viewController2, *viewController3;
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {
    viewController1 = [[FirstViewController alloc] initWithNibName:@"FirstViewController_iPhone" bundle:nil];
    viewController2 = [[SecondViewController alloc] initWithNibName:@"SecondViewController_iPhone" bundle:nil];
    viewController3 = [[ThirdViewController alloc] initWithNibName:@"ThirdViewController_iPhone" bundle:nil]; 
} else {
    viewController1 = [[FirstViewController alloc] initWithNibName:@"FirstViewController_iPad" bundle:nil];
    viewController2 = [[SecondViewController alloc] initWithNibName:@"SecondViewController_iPad" bundle:nil];
    viewController3 = [[ThirdViewController alloc] initWithNibName:@"ThirdViewController_iPad" bundle:nil];
}
self.tabBarController = [[UITabBarController alloc] init];
self.tabBarController.viewControllers = [NSArray arrayWithObjects:viewController1, viewController2, viewController3, nil];

然后我运行该项目并得到:由于未捕获的异常“NSInternalInconsistencyException”而终止应用程序，原因:“-[UIViewController _loadViewFromNibNamed:bundle:] 加载了“ThirdViewController_iPhone”nib 但未设置 View 导出。”

如何设置 socket ？

Answer 1

对于您的 ThirdViewController_iPhone.xib，请遵循说明 here .我认为您需要执行此步骤:

• You should see "outlets" with "view" under it. Drag the circle next to it over to the "view" icon on the left bar