iOS中plist的建立，資料寫入與讀取

功能建立一個test.plist檔案，textInput作為輸入，displayLabel作為顯示，有一個按鈕來觸發保持程式triggerStorage；-(void)triggerStorage{    displayLabel.text = textInput.text;        NSArray *paths=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES);    NSString *path=[paths    objectAtIndex:0];      NSString *filename=[path stringByAppendingPathComponent:@"test.plist"];   //擷取路徑        NSDictionary* dic2 = [NSDictionary dictionaryWithContentsOfFile:filename];  //讀取資料    NSLog(@"dic2 is:%@",dic2);         //建立一個dic，寫到plist檔案裡    NSDictionary* dic = [NSDictionary dictionaryWithObjectsAndKeys:displayLabel.text,@"IP",nil]; //寫入資料    [dic writeToFile:filename atomically:YES];    } // Implement viewDidLoad to do additional setup after loading the view, typically from a nib.- (void)viewDidLoad{    NSMutableArray *resultData;     NSArray *paths=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES);    NSString *path=[paths objectAtIndex:0];    NSLog(@"path = %@",path);       NSString *filename=[path stringByAppendingPathComponent:@"test.plist"];       //讀檔案    NSDictionary* dic2 = [NSDictionary dictionaryWithContentsOfFile:filename];    NSLog(@"dic is:%@",dic2);        if(dic2 == nil)    {        //1. 建立一個plist檔案         NSFileManager* fm = [NSFileManager defaultManager];        [fm createFileAtPath:filename contents:nil attributes:nil];            }    else    {        resultData=[dic2 objectForKey:@"IP"];         if([dic2 count] > 0)        {            displayLabel.text = resultData;        }        else        {            displayLabel.text = @" ";        }    }    self.navigationItem.rightBarButtonItem = [[[UIBarButtonItem alloc]   //按鈕的初始化及觸發條件設定                                               initWithTitle:@"儲存"                                                style:UIBarButtonItemStylePlain                                                target:self                                                action:@selector(triggerStorage)] autorelease];        [super viewDidLoad];}------------------------------------------------------------------------------------------------------------------------------------------------------------參考代碼：plist 檔案讀寫    //1. 建立一個plist檔案    NSArray *paths=NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES);  www.2cto.com    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];        //建立一個dic，寫到plist檔案裡    NSDictionary* dic = [NSDictionary dictionaryWithObjectsAndKeys:@"sina",@"1",@"163",@"2",nil];    [dic writeToFile:filename atomically:YES];        //讀檔案    NSDictionary* dic2 = [NSDictionary dictionaryWithContentsOfFile:filename];    NSLog(@"dic is:%@",dic2);