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//
// TestWKwebViewController.m
// Hybrid-framework
//
// Created by Kevin on 2019/4/22.
// Copyright © 2019 王凯. All rights reserved.
//
#import "TestWKWebViewController.h"
#import <WebKit/WebKit.h>
#import "WKJavaScriptBridge.h"
@interface TestWKWebViewController ()<WKNavigationDelegate, WKUIDelegate>
@property (nonatomic, strong) WKJavaScriptBridge *bridge;
@property (nonatomic, strong) WKWebView *webView;
@property (nonatomic, strong) WKProcessPool *processPool;
@property (nonatomic, assign, getter=loadFinished) BOOL isLoadFinished;
@end
@implementation TestWKWebViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
self.isLoadFinished = NO;
/*
由于WKWebView在请求过程中用户可能退出界面销毁对象，当请求回调时由于接收处理对象不存在，造成Bad Access crash，所以可将WKProcessPool设为单例
*/
static WKProcessPool *_sharedWKProcessPoolInstance = nil;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
_sharedWKProcessPoolInstance = [[WKProcessPool alloc] init];
});
self.processPool = _sharedWKProcessPoolInstance;
WKWebViewConfiguration *configuration = [[WKWebViewConfiguration alloc] init];
WKPreferences *preferences = [WKPreferences new];
preferences.javaScriptCanOpenWindowsAutomatically = YES;
preferences.minimumFontSize = 40.0;
configuration.preferences = preferences;
configuration.processPool = self.processPool;
WKWebView *webView = [[WKWebView alloc] initWithFrame:self.view.frame configuration:configuration];
self.webView = webView;
webView.navigationDelegate = self;
[self addUserScript:webView];
/***/
self.bridge = [WKJavaScriptBridge bindBridgeWithWebView:webView];
[self.bridge openWhiteList:YES];
/***/
[self.view addSubview:webView];
/*
//解决首个请求cookie带不上的问题可以使用如下方式
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@""]];
[WKWebViewCookieMgr syncRequestCookie:request];
[webView loadRequest:request];
*/
NSString *urlStr = [[NSBundle mainBundle] pathForResource:@"index.html" ofType:nil];
NSURL *fileURL = [NSURL fileURLWithPath:urlStr];
if (@available(iOS 9.0, *)) {
[webView loadFileURL:fileURL allowingReadAccessToURL:fileURL];
} else {
// Fallback on earlier versions
}
}
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
/*
解决调用系统相机等产生白屏，导致内存紧张，WebContent Process 被系统挂起，此时不会执行webViewWebContentProcessDidTerminate:函数
*/
if (!self.webView.title) {
[self.webView reload];
}
}
- (void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
self.isLoadFinished = YES;
}
#pragma mark - privite
/**
通过·document.cookie·设置cookie解决后续页面(同域)Ajax、iframe请求的cookie问题
@param webView wkwebview
*/
- (void)addUserScript:(WKWebView *)webView {
// NSString *js = [WKWebViewCookieMgr clientCookieScripts];
// if (!js) return;
// WKUserScript *jsscript = [[WKUserScript alloc]initWithSource:js
// injectionTime:WKUserScriptInjectionTimeAtDocumentStart
// forMainFrameOnly:NO];
// [webView.configuration.userContentController addUserScript:jsscript];
}
#pragma mark - WKNavigationDelegate
- (void)webViewWebContentProcessDidTerminate:(WKWebView *)webView {
/*
解决内存过大引起的白屏问题
*/
[webView reload];
}
- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler{
/*
//如果是302重定向请求，此处拦截带上cookie重新request
NSMutableURLRequest *newRequest = [WKWebViewCookieMgr newRequest:navigationAction.request];
[webView loadRequest:newRequest];
*/
decisionHandler(WKNavigationActionPolicyAllow);
}
- (void)webView:(WKWebView *)webView runJavaScriptAlertPanelWithMessage:(NSString *)message initiatedByFrame:(WKFrameInfo *)frame completionHandler:(void (^)(void))completionHandler {
//解决window.alert() 时 completionHandler 没有被调用导致崩溃问题
if (!self.isLoadFinished) {
completionHandler();
return;
}
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"" message:message preferredStyle:UIAlertControllerStyleAlert];
[alertController addAction:[UIAlertAction actionWithTitle:@"确认" style:UIAlertActionStyleCancel handler:^(UIAlertAction *action) { completionHandler(); }]];
if (self)
[self presentViewController:alertController animated:YES completion:^{}];
else
completionHandler();
}
@end