//1、創建UD對象 單例
NSUserDefaults *ud = [NSUserDefaults standardUserDefaults];//獲取UD對象
//2、獲取指定信息
NSString *username = [ud objectForKey:@"username"];
if(username){
NSLog(@"有登錄記錄");
NSLog(@"%@",username);
}else{
NSLog(@"沒有登錄記錄");
username = @"8856";
[ud setObject:username forKey:@"username"];
}
//獲取密碼
NSString *pwd = [ud objectForKey:@"pwd"];
if(!pwd){
[ud setObject:@"1234534455" forKey:@"pwd"];
}
pwd = [ud objectForKey:@"pwd"];
NSLog(@"%@",pwd);