【objetive-C基础】读写 .plist 文件

代码

   
     

    
      
    
      以name，phoneNumber，age三个字段为例。 iPhone 在文本框中输入数据，获取后装入数组中，然后把数组写入.plist文件

写操作

 NSString 
    
      *
    
      name
    
      =
    
      [txt1 text];
 NSNumber 
    
      *
    
      phoneNumber
    
      =
    
      [[NSNumber alloc] initWithInt:[[txt2 text] intValue]];
 NSNumber 
    
      *
    
      age
    
      =
    
      [[NSNumber alloc] initWithInt:[[txt3 text] intValue]];
 
 NSMutableArray 
    
      *
    
      array
    
      =
    
      [[NSMutableArray alloc]init];
 [array addObject:name];
 [array addObject:phoneNumber];
 [array addObject:age];

 NSArray 
    
      *
    
      paths
    
      =
    
      NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES);
 NSString 
    
      *
    
      path
    
      =
    
      [paths objectAtIndex:
    
      0
    
      ];
 NSString 
    
      *
    
      filename
    
      =
    
      [path stringByAppendingPathComponent:
    
      @"
    
      personal.plist
    
      "
    
      ]; 
 
 [array writeToFile:filename atomically:YES];
 [array release]; 

 

读操作

NSArray 
    
      *
    
      paths
    
      =
    
      NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES);
 NSString 
    
      *
    
      path
    
      =
    
      [paths objectAtIndex:
    
      0
    
      ];
 NSString 
    
      *
    
      filename
    
      =
    
      [path stringByAppendingPathComponent:
    
      @"
    
      personal.plist
    
      "
    
      ];
 
 NSMutableArray 
    
      *
    
      array
    
      =
    
      [[NSMutableArray alloc] initWithContentsOfFile:filename];
 
 txt1.text
    
      =
    
      [array objectAtIndex:
    
      0
    
      ];
 txt2.text
    
      =
    
      [[NSString alloc] initWithFormat:
    
      @"
    
      %d
    
      "
    
      ,[[array objectAtIndex:
    
      1
    
      ]intValue]];
 txt3.text
    
      =
    
      [[NSString alloc] initWithFormat:
    
      @"
    
      %d
    
      "
    
      ,[[array objectAtIndex:
    
      2
    
      ]intValue]];

 [array release];
   
     

要点：在论坛里面下载了写入plist的demo,发现工程中的plist文件并没有被更改。这个是用来保存临时数据的吗？没有写入app中吗？

建议以后不明白的同学把这个path打印出来就明白来了