5 偏好设置(数据存储)

//存数据
 1 -(IBAction)save:(id)sender{
 2     NSUserDefaults *us =[NSUserDefaults standardUserDefaults];
 3     
 4     [us setObject:@"name" forKey:@"key"];
 5     [us setBool:YES forKey:@"isOn"];
 6     //保持同步
 7     [us synchronize];
 8     NSString* homePath = NSHomeDirectory();
 9     NSLog(@"%@", homePath);
10 }
//取数据
11 -(IBAction)read:(id)sender{
12     NSUserDefaults *us =[NSUserDefaults standardUserDefaults];
13     NSString *name =[us objectForKey:@"key"];
14     BOOL state =[us objectForKey:@"isOn"];
15     NSLog(@"%@,%d",name,state);
16 }