Question

在UIViewController中，我有UIScrollView占据了屏幕的一半。此UIScrollView包含UIView的集合。在某些特定事件（例如滑动）上，我希望UIScrollView能够全屏显示全屏，我该如何实现此行为？

Answer 1

试试这个......

// 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

尝试在事件上使用此方法并设置：

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

为动画滚动视图：

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

Answer 3

引用@ RAJA的回答并稍作改进：

[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

我只是扩展第一个答案，如果你想为上面的过程设置动画，可以通过附加以下代码来实现：

- (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");
                     }];

    }
}

iOS - UIScrollView从半屏到全屏

4 个答案: