ios - 将原始自定义 View 添加到窗口

Question

我将自定义 View 添加到窗口，但它不起作用。我试图弄清楚，但效果不佳。 (我在没有使用 Storyboard的情况下使用空项目模板创建了这个项目)。此屏幕应该显示屏幕右下角的红色矩形。

我想将显示红屏的自定义 View 添加到窗口，但它只显示白屏。

AppDelegate.m:

//
//  HypnosisterAppDelegate.m
//  Hypnosister
//
//  Created by TSH on 12/1/13.
//  Copyright (c) 2013 TSH. All rights reserved.
//

#import "HypnosisterAppDelegate.h"
#import "HypnosisterViewController.h"
#import "HypnosisView.h"

@implementation HypnosisterAppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.
    HypnosisterViewController *test = [[HypnosisterViewController alloc]     initWithNibName:@"HypnosisterViewController" bundle:nil];
    UINavigationController *nav = [[UINavigationController alloc]  initWithRootViewController:test];
    self.window.rootViewController = nav;

    CGRect viewFrame = CGRectMake(16, 24, 10, 15);

    HypnosisView *view = [[HypnosisView alloc] initWithFrame:viewFrame];
    [view setBackgroundColor:[UIColor redColor]];
    [[self window] addSubview:view];

    self.window.backgroundColor = [UIColor whiteColor];

    [self.window makeKeyAndVisible];
    return YES;
}

@end

---

[编辑]

我只是弄乱了顺序。

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    // Override point for customization after application launch.
    self.window.backgroundColor = [UIColor whiteColor];
    [self.window makeKeyAndVisible];

    HypnosisterViewController *test = [[HypnosisterViewController alloc]     initWithNibName:@"HypnosisterViewController" bundle:nil];
    UINavigationController *nav = [[UINavigationController alloc]  initWithRootViewController:test];
    self.window.rootViewController = nav;

    CGRect viewFrame = CGRectMake(160, 240, 100, 150);

    HypnosisView *view = [[HypnosisView alloc] initWithFrame:viewFrame];
    [view setBackgroundColor:[UIColor redColor]];
    [[self window] addSubview:view];

    return YES;
}

Answer 1

当您将 navigationcontroller 设置为 rootviewcontroller 时，HypnosisterViewController 将毫无疑问地每次出现。如果要添加自定义 View 必须添加为 HypnosisterViewController 上的 subview 。

 HypnosisView *view = [[HypnosisView alloc] initWithFrame:viewFrame];
[view setBackgroundColor:[UIColor redColor]];
[test.view addSubview:view];

希望它会起作用