SwiftUI Image Viewer

An image viewer built using SwiftUI. Featuring drag to dismiss, pinch to zoom, remote and local images, and more.

Installation via Swift Package Manager

File > Swift Packages > Add Package Dependancy

https://github.com/Jake-Short/swiftui-image-viewer.git

Usage

Local Image:

The image parameter accepts Binding<Image> in all versions. As of 1.0.20, it also accepts Binding<Image?>

import ImageViewer

struct ContentView: View {
    @State var showImageViewer: Bool = true
    @State var image = Image("example-image")
	
    var body: some View {
        VStack {
            Text("Example!")
        }
	.frame(maxWidth: .infinity, maxHeight: .infinity)
        .overlay(ImageViewer(image: self.$image, viewerShown: self.$showImageViewer))
    }
}

Remote Image:

The imageURL parameter accepts Binding<String>

import ImageViewerRemote

struct ContentView: View {
    @State var showImageViewer: Bool = true
    @State var imgURL: String = "https://..."
	
    var body: some View {
        VStack {
            Text("Example!")
        }
	.frame(maxWidth: .infinity, maxHeight: .infinity)
        .overlay(ImageViewerRemote(imageURL: self.$imgURL, viewerShown: self.$showImageViewer))
    }
}

Customization

HTTP Headers

Availability: 1.0.15 or higher

The remote image viewer allows HTTP headers to be included in the URL request. To use them, pass a dictonary to the httpHeaders field. The format should be [Header: Value], both strings.

Example:

import ImageViewerRemote

struct ContentView: View {
    @State var showImageViewer: Bool = true
	
    var body: some View {
        VStack {
            Text("Example!")
        }
	.frame(maxWidth: .infinity, maxHeight: .infinity)
        .overlay(ImageViewerRemote(imageURL: URL(string: "https://..."), viewerShown: self.$showImageViewer, httpHeaders: ["X-Powered-By": "Swift!"]))
    }
}

Explicit Aspect Ratio

Availability: 1.0.21 or higher

An explcit image aspect ratio can be specified, which fixes an issue of incorrect stretching that occurs in certain situations. The aspectRatio parameter accepts Binding<CGFloat>

Example:

import ImageViewer

struct ContentView: View {
    @State var showImageViewer: Bool = true
    @State var image = Image("example-image")
	
    var body: some View {
        VStack {
            Text("Example!")
        }
	.frame(maxWidth: .infinity, maxHeight: .infinity)
        .overlay(ImageViewer(image: self.$image, viewerShown: self.$showImageViewer, aspectRatio: .constant(2)))
    }
}

Disable Cache

Availability: 1.0.25 or higher

To disable cache on the remote image viewer, simply pass a Bool value to the disableCache parameter

Example:

import ImageViewerRemote

struct ContentView: View {
    @State var showImageViewer: Bool = true
	
    var body: some View {
        VStack {
            Text("Example!")
        }
	.frame(maxWidth: .infinity, maxHeight: .infinity)
        .overlay(ImageViewerRemote(imageURL: URL(string: "https://..."), viewerShown: self.$showImageViewer, disableCache: true))
    }
}

Compatibility

This package is compatible on iOS 13 and later.

Previous to 1.0.18, this package used Swift tools version 5.2. If you receive an error while trying to use the package, you may be on an older version of Xcode, and should use version 1.0.18 of this package or later.

As of 1.0.18 and later, this package uses Swift tools version 5.1, allowing for compatibility with more Xcode versions.

GitHub