<span style="font-size: 14px;">- (BOOL)application:(UIApplication *)application shouldSaveApplicationState:(NSCoder
*)coder{ return
YES;}- (BOOL)application:(UIApplication *)application shouldRestoreApplicationState:(NSCoder
*)coder{ return
YES;}</span> |
<span style="font-size: 14px;">- (void)encodeRestorableStateWithCoder:(NSCoder
*)coder{ [super
encodeRestorableStateWithCoder:coder]; [coder encodeObject:self.doorPhoto forKey:@"doorPhoto"];}- (void)decodeRestorableStateWithCoder:(NSCoder
*)coder{ [super
decodeRestorableStateWithCoder:coder]; self.doorPhoto = [coder decodeObjectForKey:@"doorPhoto"];}</span> |
当在程序中按下home键的时候，就会调用encodeRestorableStateWithCoder:来保存你想要保存的对象，再下一次打开程序的时候，就会调用decodeRestorableStateWithCoder:来恢复你之前保存好的对象。
原文：http://www.cnblogs.com/adamleung/p/3512893.html