iphone 寫檔和讀檔

前輩說，程式命名做的好就不用寫註解，所以nothing to say

-(void)writeToTextFile:(NSString*)content withFileName:(NSString*)textFileName

{

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

    

    NSString *documentsDirectory = [paths objectAtIndex:0];

    NSString *fileName = [NSString stringWithFormat:@"%@/%@",documentsDirectory,textFileName];

    

    //save context to file

    [content writeToFile:fileName atomically:NO encoding:NSStringEncodingConversionAllowLossy error:nil];

}

-(void)readTextFile:(NSString *)textFileName

{

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

    

    NSString *documentsDirectory = [paths objectAtIndex:0];

    NSString *fullFileName = [NSString stringWithFormat:@"%@/%@",documentsDirectory,textFileName];

    

    NSString *content = [[NSString alloc] initWithContentsOfFile:fullFileName usedEncoding:nil error:nil];

    NSLog(@"%@",content);

    [content release];

}

- (void)viewDidLoad

{

    [super viewDidLoad];

    NSString *testContent = @"test to write file text!!";

    [self writeToTextFile:testContent withFileName:@"textfile.txt"];

    [self readTextFile:@"textfile.txt"];

    

}

UIView滑動動畫效果

//這一行設定的768是起始點
SlideView.frame = CGRectMake(768, 512, 384, 512-43);
//要先顯示在畫面上，再做滑動
[self.view.superview addSubview: SlideView];
//動畫的參數設定
[UIView beginAnimations:@"animation" context:ObjBusinessCard.view];
[UIView setAnimationDuration:0.5];
[UIView setAnimationDelegate:self];
            //設定動畫開始時的圖片狀態（當前狀態）
            [UIView setAnimationBeginsFromCurrentState:YES];
          
            //設定動畫結束時的圖片狀態(滑動後的位置)
            SlideView.transform = CGAffineTransformTranslate(SlideView.transform, x, 512);
            //結束後的位置要設定給frame否則會無法顯示在畫面上
            SlideView.frame = CGRectMake(x, 512, 384, 512-43);
            //產生動畫
            [UIView commitAnimations];
※重要提示，若是要滑出螢幕外，若有使用removeformsuperview會導致滑出失效