iOS 中plist中的对象的读写操作

最新推荐文章于 2020-04-28 20:20:55 发布

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本文介绍了一个使用Objective-C编写的示例程序，演示了如何从Plist文件中读取数据并将其输出，同时也展示了如何创建新的字典对象并将它们写回到Plist文件中。该示例适用于学习Objective-C中Plist文件的基本操作。

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- (IBAction)readPlist:(id)sender
{
    NSString *plistPath = [[NSBundle mainBundle] pathForResource:@"Person" ofType:@"plist"];
    NSMutableDictionary *data = [[NSMutableDictionary alloc] initWithContentsOfFile:plistPath];
    
   // NSLog(@"%@", data);//直接打印数据。
//    NSLog(@"\n指定对象名获取对象－－－：%@", [data objectForKey:@"person_1"]);
//    NSString *name = [[data objectForKey:@"person_1"] objectForKey:@"name"];
//    NSLog(@"\n指定对象名获取对象属性：person_1.name－－－：%@", name);
    
    
    //遍历字典
    for (NSString *key in data)
    {
        //NSLog(@"\nkey:%@   value:%@", key,[data objectForKey:key]);
        
        //输出对象的属性值
        NSNumber *age  =(NSNumber*) [[data objectForKey:key] objectForKey:@"age"];
        
        NSString *name = [[data objectForKey:key] objectForKey:@"name"];
        
        NSString * sex = [[data objectForKey:key] objectForKey:@"sex"];
        
        NSLog(@"\n name:%@   age:%@   sex:%@", name,age,sex);
        
        
    }

}

- (IBAction)writePlist:(id)sender
{
    
    NSString *name_key = @"name";
    NSString *age_key = @"age";
    NSString *sex_key = @"sex";
    
    NSString *name = @"越敏";
    NSNumber *age = [NSNumber numberWithInteger:123];
    NSString *sex = @"woman";
    
    NSDictionary *tempDict = [NSDictionary dictionaryWithObjectsAndKeys:
                               name,name_key,
                               age,age_key,
                               sex,sex_key,
                               nil];
    
   // NSLog(@"09090----:%@",tempDict);
    
    NSString *plistPath = [[NSBundle mainBundle] pathForResource:@"Person" ofType:@"plist"];
    NSMutableDictionary *data = [[NSMutableDictionary alloc] initWithContentsOfFile:plistPath];
   // NSLog(@"%@", data);
    
    //添加一项内容
    [data setObject:tempDict forKey:@"person_3"];
    
    
    //获取应用程序沙盒的Documents目录
    NSArray *paths=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES);
    NSString *plistPath1 = [paths objectAtIndex:0];
    
    //得到完整的文件名
    NSString *filename=[plistPath1 stringByAppendingPathComponent:@"Person.plist"];
    //输入写入
    [data writeToFile:filename atomically:YES];
    
    //打印；输出结果
    NSMutableDictionary *data1 = [[NSMutableDictionary alloc] initWithContentsOfFile:filename];
    NSLog(@"%@", data1);
    
    

    
    
}