iphone - 应用程序关闭后如何保存变量？

Question

我想在应用程序关闭后保存一些整数并在应用程序打开后恢复它们，最简单的方法是什么？

Answer 1

您应该从 NSUserDefaults 存储和加载数据:

http://developer.apple.com/library/IOS/#documentation/Cocoa/Reference/Foundation/Classes/NSUserDefaults_Class/Reference/Reference.html

NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
// to store
[defaults setObject:[NSNumber numberWithInt:12345] forKey:@"myKey"];
[defaults synchronize];

// to load
NSNumber *aNumber = [defaults objectForKey:@"myKey"];
NSInteger anInt = [aNumber intValue];