ios - 试图构建一个顶部带有导航栏的表格 View

Question

这是我使用的代码。我错过了什么？

- (void)loadView
{
    CGSize screen_size = [[UIScreen mainScreen] bounds].size;

    CGFloat navBarHeight = 40;

    UINavigationBar *nav = [[UINavigationBar alloc] initWithFrame:CGRectMake(0, 0, screen_size.width, navBarHeight)];

    UITableView *table = [[UITableView alloc] initWithFrame:CGRectMake(0, navBarHeight, screen_size.width, screen_size.height - navBarHeight) style:UITableViewStylePlain];

    table.autoresizingMask = UIViewAutoresizingFlexibleHeight|UIViewAutoresizingFlexibleWidth;
    table.delegate = self;
    table.dataSource = self;
    table.editing = YES;
    [table reloadData];

    [self.view addSubview:nav];
    [self.view addSubview:table];
    [nav release];
    [table release];
}

我在状态栏下方看到一个黑屏，而不是下方有表格的导航栏。

Answer 1

您需要在 loadView 方法中创建一个包含 View ，并将其设置为 View Controller 上的 View :

- (void)loadView {


    CGSize screen_size = [[UIScreen mainScreen] bounds].size;

    UIView *myView = [[UIView alloc] initWithFrame:CGRectMake(0,0,screen_size.width,screen_size.height)];
    self.view = myView;

    CGFloat navBarHeight = 40;

    UINavigationBar *nav = [[UINavigationBar alloc] initWithFrame:CGRectMake(0, 0, screen_size.width, navBarHeight)];

    UITableView *table = [[UITableView alloc] initWithFrame:CGRectMake(0, navBarHeight, screen_size.width, screen_size.height - navBarHeight) style:UITableViewStylePlain];

    table.autoresizingMask = UIViewAutoresizingFlexibleHeight|UIViewAutoresizingFlexibleWidth;
    table.delegate = self;
    table.dataSource = self;
    table.editing = YES;
    [table reloadData];

    [self.view addSubview:nav];
    [self.view addSubview:table];
    [nav release];
    [table release];
    [myView release];

}

或者，如果您有一个与 View Controller 关联的 nib 文件，那么您应该使用 viewDidLoad 方法而不是 loadView。