plist 文件读写

//1. 创建一个plist文件
    NSArray *paths=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES);
    NSString *path=[paths    objectAtIndex:0];
    NSLog(@"path = %@",path);
    NSString *filename=[path stringByAppendingPathComponent:@"test.plist"];    
    NSFileManager* fm = [NSFileManager defaultManager];
    [fm createFileAtPath:filename contents:nil attributes:nil];        
    //NSDictionary* dic = [NSDictionary dictionaryWithContentsOfFile:plistPath];
    
    //创建一个dic，写到plist文件里
    NSDictionary* dic = [NSDictionary dictionaryWithObjectsAndKeys:@"sina",@"1",@"163",@"2",nil];
    [dic writeToFile:filename atomically:YES];
    
    //读文件
    NSDictionary* dic2 = [NSDictionary dictionaryWithContentsOfFile:filename];

    NSLog(@"dic is:%@",dic2);