What do you need to know about UIScrollView?
In this UIScrollView tutorial, you’ll create an app similar to the default iOS Photos app and learn all about UIScrollView. You’ll learn how to: Use UIScrollView to zoom and view a very large image.
How to zoom in and out in UIImageView?
To support zooming, we must set a delegate for your scroll view. The delegate object must conform to the UIScrollViewDelegate protocol. That delegate class must implement the viewForZoomingInScrollView () method and return the view to zoom. Then add the following delegate function to the class.
How is zoomedphotoviewcontroller conforms to uiscrollviewdelegate?
This makes ZoomedPhotoViewController conform to UIScrollViewDelegate and implements viewForZooming (in:). The scroll view calls this method to determine which of its subviews to scale when the user pinches the image. Here, you tell it to scale imageView. This method calculates the zoom scale for the scroll view.
How to zoom in and out in iOS 10?
Extension for rich Push Notification – iOS 10. And then set these properties: scrollView.minimumZoomScale = 0.1 scrollView.maximumZoomScale = 4.0 scrollView.zoomScale = 1.0 scrollview.delegate = self as? UIScrollViewDelegate To zoom in and out image we must specify the amount the user can zoom in and out.
How to make the page control outside the ScrollView?
Ensure that the page control is outside the scrollview and not part of the scrollview. Ensure that the page control is outside the scrollview and not part of the scrollview. Click the Assistant button in the Xcode toolbar near the top right corner of Xcode to open the assistant editor. In your storyboard, select the scrollview.
How to add UIScrollView to storyboard controller?
Inside the main.storyboard, pick the UIScrollview from the Object Library and add it to the view controller. The UIScrollView should fill whole view as shown below. Pick a PageControl from the Object Library and add it to the controller. Ensure that the page control is outside the scrollview and not part of the scrollview.
