NSUserDefaults类registerDefaults的使用

最新推荐文章于 2023-11-23 22:29:11 发布

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#NSUserDefaults #registerDefaults

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本文介绍如何在应用启动时设置默认配置，并演示如何读取、修改和删除用户配置数据，实现基本的数据操作。

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    // Override point for customization after application launch.
    NSDictionary *dicDefault = [NSDictionary dictionaryWithObjectsAndKeys: @"hslinux", @"Name",nil];
    [[NSUserDefaults standardUserDefaults] registerDefaults:dicDefault];
    
    return YES;
}

    NSString *strName = [[NSUserDefaults standardUserDefaults] stringForKey:@"Name"];
    NSLog(@" Name = [%@]", strName);
    [[NSUserDefaults standardUserDefaults] setObject:@"?????" forKey:@"Name"];
    
    strName = [[NSUserDefaults standardUserDefaults] stringForKey:@"Name"];
    NSLog(@" Name = [%@]", strName);
    
    [[NSUserDefaults standardUserDefaults] removeObjectForKey:@"Name"];
    
    NSString *strDefault = [[NSUserDefaults standardUserDefaults] stringForKey:@"Name"];
    NSLog(@"Default Name = [%@]", strDefault);