对plist文件的读写操作

通过读写 .plist 文件，我们可以在 iPhone 里记录或调取数据，下面就是 CocoaChina 会员 “pjk1129” 分享的读写 .plist 文件的代码

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];