ZoomableUIView

ZoomableUIView is a protocol that any UIView can conform to in order to be able to zoom and pan views without using UIScroll View. Particularly handy for views within UIScrollViews

ZoomableUIView is using swift3.

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Usage

The simple code to get ZoomableUIView running in your own app.

• In case you installed ZoomableUIView via CocoaPods you need to import it (add this somewhere at the top of your source code file):

    import ZoomableUIView

• When you want to conform to the protocol:

     class CustomView: UIView, ZoomableUIView

• Or:

     extension CustomView: ZoomableUIView

• If you want to set the view zoomable:

    self.setZoomable(true)

• When you want to reset the zoom:

    self.reset()

• Mandatory protocol conformance

Works like UIScrollViewDelegate's viewForZooming. May well be that you want to use self in this case but you may want the current view to handle the zoom recognition and a subview to be zoomed, in that case return the subview in this func

    func viewForZooming() -> UIView

Set zooming options such as min and max zoom

   func optionsForZooming() -> ZoomableViewOptions

If you want to overwrite the default reset logic then feel free to implement

   func reset() 

But it's not required

Requirements

UIKit must be imported. If you are using ZoomableUIView in an App Extension, you must add EXTENSION to your Other Swift Flags Build Settings.

Installation

ZoomableUIView is available through CocoaPods. To install it, simply add the following line to your Podfile:

    pod "ZoomableUIView"

In case you don’t want to use CocoaPods - just copy the files ZoomableUIView/ZoomableUIView.swift & ZoomableUIView/CGAffineTransform.swift to your Xcode project.

Credit

Author: James Coughlan

License

**ZoomableUIView** is available under the MIT license. See the LICENSE file for more info.