iOS - UIScrollView從一半到全屏

Question

在UIViewController中，我有一個UIScrollView，它佔用了屏幕的一半。此UIScrollView包含UIView的集合。在某些特定事件（例如滑動）上，我希望我的UIScrollView能夠全屏動畫，我該如何實現這一行爲？

Answer 1

嘗試......

// adding swipe gesture to your scrollview 
UISwipeGestureRecognizer *swipeLeft = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipe:)]; 

// Set swipe direction. 
[swipeLeft setDirection:UISwipeGestureRecognizerDirectionLeft]; 
[scrollview addGestureRecognizer:swipeLeft]; 


// add gesture action method 
- (void)handleSwipe:(UISwipeGestureRecognizer *)swipe { 
// if you are having only one swipe gesture, you no need to add the below condition. you can add the code inside the condition 
if (swipe.direction == UISwipeGestureRecognizerDirectionLeft) { 
    NSLog(@"Left Swipe"); 
    scrollView.contentSize = self.view.frame; 
    scrollView.frame = self.view.frame; 
} 
} 

Answer 2

嘗試使用這種方法的事件，並設置：

scrollView.contentSize = CGSizeMake(847, 800); // change on basis of your requirement 

對於動畫滾動視圖：

- (void)setContentOffset:(CGPoint)contentOffset animated:(BOOL)animated; // animate at constant velocity to new offset 

Answer 3

從@ RAJA的回答和引用略有改善：

[UIView beginAnimations:@"whatever" context:nil]; 

scrollView.contentSize = CGSizeMake(self.view.frame.size.width, self.view.frame.size.height * <count of subviews>); 
scrollView.frame = self.view.frame; 

[UIView commitAnimations]; 

Answer 4

我只是延長了第一個答案，如果你想動畫上述過程，就可以實現通過追加下面的代碼：

- (void)handleSwipe:(UISwipeGestureRecognizer *)swipe 
{ 
    if (swipe.direction == UISwipeGestureRecognizerDirectionLeft) 
    { 
    [UIView animateWithDuration:0.15f // set duration for your animation here 
        animations:^{ 

         scrollView.contentSize = self.view.frame; 
         scrollView.frame = self.view.frame; 
        } 
        completion:^(BOOL finished){ 
         NSLog(@"completion block"); 
        }]; 

    } 
}