读写 .plist 文件的代码例子

CocoaChina 2010-08-02 17:16:17 12183

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];