如何将用户设置的值保留给UISwitch? [英] How to keep user set values to UISwitch?

问题描述

我从界面构建器中获取了UISwitch.当时状态为ON.运行应用程序后，将其位置更改为OFF并转到其他屏幕，然后再次返回该屏幕时，开关状态显示为ON而不是我先前设置的OFF.任何人都可以告诉我如何显示我设置的UISwitch位置或状态.现在，当我进入此切换屏幕时，它始终显示为ON.请帮我.提前致谢.

I have taken UISwitch from interface builder. That time it's state is ON.After run application When I change it's position to OFF and go to other screen and again back to that screen, switch sates shows ON not OFF which i set previously. Any one can tell me how i can show UISwitch position or state which I set. Now it always show ON when I come to this switch screen. Please help me. Thanks in advance.

推荐答案

更改值时，将其保存到NSUserDefault，因此，当再次返回该屏幕时，您将查看首选项值并将其设置为开关

When you change the value, save it to NSUserDefault, so when you come back that screen again, you look at the preferences value and set it to the switch

- (void)saveValue  {
    NSUserDefaults *preferences = [NSUserDefaults standardUserDefaults];
    [preferences setBool:value forKey:@"switchOnOff"];
    [preferences synchronize];
}

- (BOOL)readValue  {
    NSUserDefaults *preferences = [NSUserDefaults standardUserDefaults];
    return [preferences boolForKey:@"switchOnOff"];
}

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