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Create the WKWebView instance at runtime.

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Specify a container view in the storyboard and create+install the web view
at viewDidLoad time.

This lets us experiment with solutions for providing a web view that avoids
the flash-to-white problem.
This commit is contained in:
Jim Correia 2019-08-31 12:30:01 -07:00
parent e5782ca464
commit a5b2c759ec
2 changed files with 31 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
iOS/Base.lproj/Main.storyboard
View File

@ -1,8 +1,8 @@
<?xml version="1.0" encoding="UTF-8"?> <?xml version="1.0" encoding="UTF-8"?>
<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="14854.2" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES"> <document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="14865.1" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES">
<device id="retina6_1" orientation="portrait" appearance="light"/> <device id="retina6_1" orientation="portrait" appearance="light"/>
<dependencies> <dependencies>
<plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="14806.4"/> <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="14819.2"/>
<capability name="Safe area layout guides" minToolsVersion="9.0"/> <capability name="Safe area layout guides" minToolsVersion="9.0"/>
<capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/> <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
</dependencies> </dependencies>
@ -15,22 +15,13 @@
<rect key="frame" x="0.0" y="0.0" width="414" height="896"/> <rect key="frame" x="0.0" y="0.0" width="414" height="896"/>
<autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/> <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
<subviews> <subviews>
<wkWebView opaque="NO" contentMode="scaleToFill" translatesAutoresizingMaskIntoConstraints="NO" id="t8d-md-Yhc"> <view contentMode="scaleToFill" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="DNb-lt-KzC">
<rect key="frame" x="0.0" y="44" width="414" height="769"/> <rect key="frame" x="0.0" y="44" width="414" height="769"/>
<color key="backgroundColor" white="0.0" alpha="0.0" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/> <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
<wkWebViewConfiguration key="configuration"> <color key="backgroundColor" systemColor="systemBackgroundColor" cocoaTouchSystemColor="whiteColor"/>
<audiovisualMediaTypes key="mediaTypesRequiringUserActionForPlayback" none="YES"/> </view>
<wkPreferences key="preferences"/>
</wkWebViewConfiguration>
</wkWebView>
</subviews> </subviews>
<color key="backgroundColor" systemColor="systemBackgroundColor" cocoaTouchSystemColor="whiteColor"/> <color key="backgroundColor" systemColor="systemBackgroundColor" cocoaTouchSystemColor="whiteColor"/>
<constraints>
<constraint firstItem="t8d-md-Yhc" firstAttribute="top" secondItem="VUw-jc-0yf" secondAttribute="top" id="0aK-ew-1HG"/>
<constraint firstItem="VUw-jc-0yf" firstAttribute="trailing" secondItem="t8d-md-Yhc" secondAttribute="trailing" id="31v-r8-kzh"/>
<constraint firstItem="VUw-jc-0yf" firstAttribute="bottom" secondItem="t8d-md-Yhc" secondAttribute="bottom" id="kK6-eC-XwD"/>
<constraint firstItem="t8d-md-Yhc" firstAttribute="leading" secondItem="VUw-jc-0yf" secondAttribute="leading" id="nDG-aV-vqc"/>
</constraints>
<viewLayoutGuide key="safeArea" id="VUw-jc-0yf"/> <viewLayoutGuide key="safeArea" id="VUw-jc-0yf"/>
</view> </view>
<toolbarItems> <toolbarItems>
@ -112,7 +103,7 @@
<outlet property="prevArticleBarButtonItem" destination="v4j-fq-23N" id="Gny-Oh-cQa"/> <outlet property="prevArticleBarButtonItem" destination="v4j-fq-23N" id="Gny-Oh-cQa"/>
<outlet property="readBarButtonItem" destination="hy0-LS-MzE" id="BzM-x9-tuj"/> <outlet property="readBarButtonItem" destination="hy0-LS-MzE" id="BzM-x9-tuj"/>
<outlet property="starBarButtonItem" destination="wU4-eH-wC9" id="Z8Q-Lt-dKk"/> <outlet property="starBarButtonItem" destination="wU4-eH-wC9" id="Z8Q-Lt-dKk"/>
<outlet property="webView" destination="t8d-md-Yhc" id="Iqg-bg-wds"/> <outlet property="webViewContainer" destination="DNb-lt-KzC" id="Fc1-Ae-pWK"/>
</connections> </connections>
</viewController> </viewController>
<placeholder placeholderIdentifier="IBFirstResponder" id="FJe-Yq-33r" sceneMemberID="firstResponder"/> <placeholder placeholderIdentifier="IBFirstResponder" id="FJe-Yq-33r" sceneMemberID="firstResponder"/>

32
iOS/Detail/DetailViewController.swift
View File

@ -14,22 +14,36 @@ import SafariServices
class DetailViewController: UIViewController { class DetailViewController: UIViewController {
@IBOutlet weak var nextUnreadBarButtonItem: UIBarButtonItem! @IBOutlet private weak var nextUnreadBarButtonItem: UIBarButtonItem!
@IBOutlet weak var prevArticleBarButtonItem: UIBarButtonItem! @IBOutlet private weak var prevArticleBarButtonItem: UIBarButtonItem!
@IBOutlet weak var nextArticleBarButtonItem: UIBarButtonItem! @IBOutlet private weak var nextArticleBarButtonItem: UIBarButtonItem!
@IBOutlet weak var readBarButtonItem: UIBarButtonItem! @IBOutlet private weak var readBarButtonItem: UIBarButtonItem!
@IBOutlet weak var starBarButtonItem: UIBarButtonItem! @IBOutlet private weak var starBarButtonItem: UIBarButtonItem!
@IBOutlet weak var actionBarButtonItem: UIBarButtonItem! @IBOutlet private weak var actionBarButtonItem: UIBarButtonItem!
@IBOutlet weak var browserBarButtonItem: UIBarButtonItem! @IBOutlet private weak var browserBarButtonItem: UIBarButtonItem!
@IBOutlet weak var webView: WKWebView! @IBOutlet private weak var webViewContainer: UIView!
private var webView: WKWebView!
weak var coordinator: AppCoordinator! weak var coordinator: AppCoordinator!
override func viewDidLoad() { override func viewDidLoad() {
super.viewDidLoad() super.viewDidLoad()
webView = WKWebView(frame: webViewContainer.bounds)
webView.translatesAutoresizingMaskIntoConstraints = false
webView.navigationDelegate = self webView.navigationDelegate = self
webViewContainer.addSubview(webView)
let constraints: [NSLayoutConstraint] = [
webView.leadingAnchor.constraint(equalTo: webViewContainer.safeAreaLayoutGuide.leadingAnchor),
webView.trailingAnchor.constraint(equalTo: webViewContainer.safeAreaLayoutGuide.trailingAnchor),
webView.topAnchor.constraint(equalTo: webViewContainer.safeAreaLayoutGuide.topAnchor),
webView.bottomAnchor.constraint(equalTo: webViewContainer.safeAreaLayoutGuide.bottomAnchor),
]
NSLayoutConstraint.activate(constraints)
markAsRead() markAsRead()
updateUI() updateUI()
reloadHTML() reloadHTML()