iOS开发学习笔记

1. 简单数据持久化

-(void)SavePersonData {
    NSUserDefaults *userDefault = [NSUserDefaults standardUserDefaults];
    [userDefault setObject:[NSNumber numberWithInt:myMoney] forKey:@"money"];
    [[NSUserDefaults standardUserDefaults] synchronize];
}

-(void)ReadPersonData {
    NSUserDefaults *userDefault = [NSUserDefaults standardUserDefaults];
    int hasInitialized = [[ userDefault objectForKey:@"initialized"] intValue];
    if(1 == hasInitialized) {
        myMoney = [[ userDefault objectForKey:@"money"] intValue];
    } else {
        [userDefault setObject:[NSNumber numberWithInt:1] forKey:@"initialized"];
        [[NSUserDefaults standardUserDefaults] synchronize];
    }
}

[self ReadPersonData];    

[self SavePersonData];