Created
January 5, 2017 03:24
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import UIKit | |
import WebKit | |
class WebVController: UIViewController { | |
@IBOutlet weak var viewForWeb: UIView! | |
@IBOutlet weak var activityIndicatorView: UIActivityIndicatorView! | |
fileprivate var webView:WKWebView? | |
fileprivate var btnBack = UIBarButtonItem() | |
var urlString:String? = nil | |
override func viewDidLoad() { | |
super.viewDidLoad() | |
setWKWebView() | |
} | |
deinit { | |
urlString = nil | |
webView = nil | |
// print("WebVC deinit.") | |
} | |
fileprivate func setWKWebView(){ | |
if (urlString ?? "") != "" { | |
if let _webUrl = urlString { | |
webView = WKWebView(frame: self.viewForWeb.bounds) | |
guard let webView = webView else { return } | |
setWKWebviewConstraints() | |
webView.navigationDelegate = self | |
let url = URL (string: _webUrl) | |
let request = URLRequest(url: url!) | |
_ = webView.load(request) | |
webView.scrollView.bounces = false//防止在頂端時往下拉的空白出現 | |
// webView?.autoresizingMask = [UIViewAutoresizing.flexibleWidth, UIViewAutoresizing.flexibleHeight] | |
} | |
} else { | |
activityIndicatorView.isHidden = true | |
view.addToBeSuppliedView() | |
} | |
} | |
//MARK:- set webView constraints | |
fileprivate func setWKWebviewConstraints(){ | |
guard let webView = webView else { return } | |
webView.translatesAutoresizingMaskIntoConstraints = false | |
let height = NSLayoutConstraint(item: webView, attribute: .height, relatedBy: .equal, toItem: viewForWeb, attribute: .height, multiplier: 1, constant: 0) | |
let width = NSLayoutConstraint(item: webView, attribute: .width, relatedBy: .equal, toItem: viewForWeb, attribute: .width, multiplier: 1, constant: 0) | |
viewForWeb.addConstraints([height, width]) | |
} | |
//MARK:- check webView can not go back | |
fileprivate func checkCanBack() { | |
guard let webView = webView else { return } | |
navigationItem.leftBarButtonItem?.isEnabled = webView.canGoBack | |
setNavBar() | |
} | |
//MARK:- set navi bar left button | |
fileprivate func setNavBar(){ | |
guard let webView = webView else { return } | |
if webView.canGoBack { | |
let back = UIBarButtonItem(image: UIImage(named: "icon-goleft"), style: .plain, target: self, action: #selector(backAction)) | |
navigationItem.leftBarButtonItem = back | |
}else{ | |
navigationItem.setLeftBarButton(nil, animated: true) | |
} | |
} | |
//MARK:- webView go back func | |
@objc fileprivate func backAction() { | |
guard let webView = webView else { return } | |
if webView.canGoBack { | |
webView.goBack() | |
} | |
} | |
} |
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