1 -(void)triggerStorage
 2 {
 3 //    displayLabel.text = textInput.text;
 4
 5     NSArray *paths=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES);
 6     NSString *path=[paths    objectAtIndex:0];
 7     NSString *filename=[path stringByAppendingPathComponent:@"test.plist"];   //获取路径
 8
 9     NSDictionary* dic2 = [NSDictionary dictionaryWithContentsOfFile:filename];  //读取数据
10     NSLog(@"dic2 is:%@",dic2);
11
12     //创建一个dic，写到plist文件里
13     NSDictionary* dic = [NSDictionary dictionaryWithObjectsAndKeys:@"displayLabel.text",@"IP",nil]; //写入数据
14 //    或者 [dic setObject:@"add some content" forKey:@"c_key"];
15     [dic writeToFile:filename atomically:YES];
16
17 }

 1 - (void)readData {
 2     NSMutableArray *resultData;
 3 //    获取应用程序沙盒的Documents目录
 4     NSArray *paths=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES);
 5     NSString *path=[paths objectAtIndex:0];
 6     NSLog(@"path = %@",path);
 7 //    得到完整的文件名
 8     NSString *filename=[path stringByAppendingPathComponent:@"test.plist"];
 9
10     //读文件
11     NSDictionary* dic2 = [NSDictionary dictionaryWithContentsOfFile:filename];
12     NSLog(@"dic is:%@",dic2);
13     if(dic2 == nil)
14     {
15         //1. 创建一个plist文件
16         NSFileManager* fm = [NSFileManager defaultManager];
17         [fm createFileAtPath:filename contents:nil attributes:nil];
18     }
19     else
20     {
21         resultData=[dic2 objectForKey:@"IP"];
22         if([dic2 count] > 0)
23         {
24 //            displayLabel.text = resultData;
25             NSLog(@"读取的值是：%@", resultData);
26         }
27         else
28         {
29 //            displayLabel.text = @" ";
30             NSLog(@"没有读取到任何值!");
31         }
32     }
33 }