Как анимировать просмотр влево / вправо с помощью UISwipeGestureRecognizer

Question

Попробуйте сделать пролистывание в режиме одиночного просмотра, и это работает, но не показывает анимацию и всплывающий указатель страницы внизу

- (void)viewDidLoad
{
[super viewDidLoad];
UISwipeGestureRecognizer *swipeleft = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(screenswipeleft)];
swipeleft.numberOfTouchesRequired=1;
swipeleft.direction=UISwipeGestureRecognizerDirectionLeft;
[self.view addGestureRecognizer:swipeleft];

UISwipeGestureRecognizer *swiperight = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(viewDidLoad)];
swiperight.numberOfTouchesRequired=1;
swiperight.direction=UISwipeGestureRecognizerDirectionRight;
[self.view addGestureRecognizer:swiperight];

UITextField *textField = [[UITextField alloc] initWithFrame:CGRectMake(10, 200, 300, 40)];
[self.view addSubview:textField];
NSLog(@"move left");

}
-(void)screenswipeleft {
UITextField *textField = [[UITextField alloc] initWithFrame:CGRectMake(10, 200, 300, 40)];
[self.view addSubview:textField];
NSLog(@"move right");

}

Answer 1

- (void)viewDidLoad
  {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.   
    _leftSwipeGestureRecognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipes:)];
    _rightSwipeGestureRecognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipes:)];

    _leftSwipeGestureRecognizer.direction = UISwipeGestureRecognizerDirectionLeft;
    _rightSwipeGestureRecognizer.direction = UISwipeGestureRecognizerDirectionRight;

    [self.view addGestureRecognizer:_leftSwipeGestureRecognizer];
    [self.view addGestureRecognizer:_rightSwipeGestureRecognizer];
}

- (void)handleSwipes:(UISwipeGestureRecognizer *)sender
 {
    if (sender.direction == UISwipeGestureRecognizerDirectionLeft) {
    CGPoint labelPosition = CGPointMake(self.swipeLabel.frame.origin.x - 100.0, self.swipeLabel.frame.origin.y);
    self.swipeLabel.frame = CGRectMake( labelPosition.x , labelPosition.y , self.swipeLabel.frame.size.width, self.swipeLabel.frame.size.height);

    }

    if (sender.direction == UISwipeGestureRecognizerDirectionRight) {
        CGPoint labelPosition = CGPointMake(self.swipeLabel.frame.origin.x + 100.0, self.swipeLabel.frame.origin.y);
        self.swipeLabel.frame = CGRectMake( labelPosition.x , labelPosition.y , self.swipeLabel.frame.size.width, self.swipeLabel.frame.size.height);
   }
}

Answer 2

Предположим, вы хотите анимировать UITextField. И ваш UITextField имеет CGRect с начальной точкой х - 50, у - 100;

   @implementation myViewController{
   UITextField *myTextField; //Declaring a textfield as an instance variable (global).
 }


    -(void)viewDidLoad{
    myTextField = [UITextField alloc]initWithFrame:CGRectMake(50,100,100,50)];//adding memory and setting its initial position
    //your other codes.
}
   -(void)screenswipeleft {
   [UIView animateWithDuration:3 animations:^{
        myTextField.frame = CGRectMake:(-75,100,100,50); //setting the same textfield in a position of -75 only showing 1/4th of the textfield. 
//this block animation would make the textfield animate from its starting position to this position in 3 seconds. (animateWithDuration:3 here u mention its duration).
    }];
   }

Примените ту же логику к другим, и вы получите нужную анимацию.

Answer 3

Попробуй это.

-(void)screenswipeleft 
{
   [UIView beginAnimations:nil context:nil];
                       [UIView setAnimationDuration:0.4];

                       textField.frame = CGRectMake(10, 200, 300, 40)];


                       [UIView commitAnimations]



}