WKWebView和UIWebView的區別
總結起來幾點：
- 內存占用變小
- 支持更多的HTML5特性
- 高刷新
- Safari相同的JavaScript引擎
- 加載速度變快
配置 
- WKWebViewConfiguration
// 當前所屬進程池
// WKProcessPool用來配置進程池，與網頁視圖的資源共享有關
@property (nonatomic, strong) WKProcessPool *processPool;
// 偏好設置
@property (nonatomic, strong) WKPreferences *preferences;
WKPreferences-> propertys
//最小字體
@property (nonatomic) CGFloat minimumFontSize;
//是否可以打開沒有用戶交互的窗口
@property (nonatomic) BOOL javaScriptCanOpenWindowsAutomatically;
// 是否應警告可疑性的欺詐內容，（釣魚網站或惡意軟件）
@property (nonatomic, getter=isFraudulentWebsiteWarningEnabled) BOOL fraudulentWebsiteWarningEnabled API_AVAILABLE(macos(10.15), ios(13.0));
//是否開啟文字互動
@property (nonatomic) BOOL textInteractionEnabled API_AVAILABLE(macos(11.3), ios(14.5));
WKUserContentController:OC與JS交互
@property (nonatomic, strong) WKUserContentController *userContentController;
WKWebsiteDataStore:網頁使用到的數據管理類
@property (nonatomic, strong) WKWebsiteDataStore *websiteDataStore API_AVAILABLE(macos(10.11), ios(9.0));
指示網絡視圖是否在【內容渲染完全加載到內存之前】禁止內容呈現，默認是NO。
@property (nonatomic) BOOL suppressesIncrementalRendering;
在用戶代理字符串中使用的應用程序的名稱。
@property (nullable, nonatomic, copy) NSString *applicationNameForUserAgent API_AVAILABLE(macos(10.11), ios(9.0));
是否支持airplay
@property (nonatomic) BOOL allowsAirPlayForMediaPlayback API_AVAILABLE(macos(10.11), ios(9.0));
枚舉類型，需要用戶手勢開始播放的媒體類型
@property (nonatomic) WKAudiovisualMediaTypes mediaTypesRequiringUserActionForPlayback API_AVAILABLE(macos(10.12), ios(10.0));
默認網頁偏好設置
@property (null_resettable, nonatomic, copy) WKWebpagePreferences *defaultWebpagePreferences API_AVAILABLE(macos(10.15), ios(13.0));
限制app跳轉
@property (nonatomic) BOOL limitsNavigationsToAppBoundDomains API_AVAILABLE(macos(11.0), ios(14.0));
指示HTML5視頻是否內嵌播放，或使用native全屏控制器。
@property (nonatomic) BOOL allowsInlineMediaPlayback;
設置選擇粒度 用戶可以在網頁視圖中交互地選擇內容的粒度級別。
@property (nonatomic) WKSelectionGranularity selectionGranularity;
HTML5視圖是否可以播放畫中畫
@property (nonatomic) BOOL allowsPictureInPictureMediaPlayback API_AVAILABLE(ios(9_0));
識別數據類型 所需的數據監測類型。
@property (nonatomic) WKDataDetectorTypes dataDetectorTypes API_AVAILABLE(ios(10.0));
用于確定WKWebView是否應始終允許縮放網頁。
@property (nonatomic) BOOL ignoresViewportScaleLimits API_AVAILABLE(ios(10.0));
#else
選擇用戶界面方向 用戶界面元素的方向。
@property (nonatomic) WKUserInterfaceDirectionPolicy userInterfaceDirectionPolicy API_AVAILABLE(macos(10.12));
#endif
設置攔截的Scheme和對應回調
- (void)setURLSchemeHandler:(nullable id <WKURLSchemeHandler>)urlSchemeHandler forURLScheme:(NSString *)urlScheme API_AVAILABLE(macos(10.13), ios(11.0));
獲取scheme對應回調
- (nullable id <WKURLSchemeHandler>)urlSchemeHandlerForURLScheme:(NSString *)urlScheme API_AVAILABLE(macos(10.13), ios(11.0));
OC與JS通訊
- 相互調用的基礎是通訊協議（方法名、參數類型），通常都是JS端和OC端根據業務邏輯來共同制定
以下代碼是對和
通訊的一個簡單封裝
#import <Foundation/Foundation.h>
@protocol WAExcuteScriptDelegate <NSObject>
- (void)excuteScript:(NSString *_Nonnull)script complition:(void (^ _Nullable)(_Nullable id, NSError * _Nullable error))complition;
@end
typedef void(^MessageHandle)(id _Nonnull body, NSString * _Nonnull name);
@class WKUserContentController;
NS_ASSUME_NONNULL_BEGIN
@interface WAScriptProcesser : NSObject
@property (nonatomic, weak) id<WAExcuteScriptDelegate> excuteDelegate;
@property (nonatomic, strong) WKUserContentController *userController;
// 腳本注入
- (void)addScript:(NSString *)script
atStart:(BOOL)atStart
isFrameMain:(BOOL)isFrameMain;
/** oc->js
@param script 執行js中定義的函數 ：getName('name');
@param complition 完成回調
*/
- (void)excuteScript:(NSString *)script complition:(void (^ _Nullable)(_Nullable id, NSError * _Nullable error))complition;
/** js->oc
* @param name ： 注冊和 js 約定好的回調名稱
* @param complition 回調
*/
- (void)registerHandleWithName:(NSString *)name complition:(MessageHandle)complition;
@end
NS_ASSUME_NONNULL_END
//
// WAScriptProcesser.m
// JSView
//
// Created by admin on 2021/11/12.
//
#import "WAScriptProcesser.h"
#import <WebKit/WebKit.h>
@interface WAScriptProcesser ()<WKScriptMessageHandlerWithReply,WKScriptMessageHandler>
@property (nonatomic, strong) NSMutableDictionary *handleDict;
@end
@implementation WAScriptProcesser
- (NSMutableDictionary *)handleDict
{
if (_handleDict == nil)
{
_handleDict = [[NSMutableDictionary alloc] init];
}
return _handleDict;
}
- (WKUserContentController *)contentController
{
if (_userController == nil)
{
_userController = [[WKUserContentController alloc] init];
}
return _userController;
}
- (void)addScript:(NSString *)script
atStart:(BOOL)atStart
isFrameMain:(BOOL)isFrameMain
{
WKUserScript *userScript = [[WKUserScript alloc] initWithSource:script injectionTime:atStart?WKUserScriptInjectionTimeAtDocumentStart:WKUserScriptInjectionTimeAtDocumentEnd forMainFrameOnly:isFrameMain];
[self.userController addUserScript:userScript];
}
- (void)excuteScript:(NSString *)script complition:(void (^ _Nullable)(_Nullable id, NSError * _Nullable error))complition
{
[self.excuteDelegate excuteScript:script complition:complition];
}
- (void)registerHandleWithName:(NSString *)name complition:(MessageHandle)complition
{
[self.userController addScriptMessageHandler:self name:name];
[self.handleDict setValue:[complition copy] forKey:name];
}
- (void)userContentController:(WKUserContentController *)userContentController didReceiveScriptMessage:(WKScriptMessage *)message replyHandler:(void (^)(id _Nullable reply, NSString *_Nullable errorMessage))replyHandler WK_SWIFT_ASYNC(3) API_AVAILABLE(macos(11.0), ios(14.0))
{
}
- (void)userContentController:(WKUserContentController *)userContentController didReceiveScriptMessage:(WKScriptMessage *)message
{
NSString *name = message.name;
id body = message.body;
MessageHandle block = (MessageHandle)[self.handleDict objectForKey:name];
if (block)
{
block(body, name);
}
}
@end
Scheme攔截
#import <Foundation/Foundation.h>
#import <WebKit/WebKit.h>
typedef void(^RouterHandler)(BOOL isStart, id <WKURLSchemeTask> _Nonnull urlSchemeTask, NSDictionary * _Nonnull params);
NS_ASSUME_NONNULL_BEGIN
@interface WARouter : NSObject
- (void)registerPattern:(NSString *)pattern handle:(RouterHandler)handle;
@end
NS_ASSUME_NONNULL_END
#import "WARouter.h"
@interface WARouter ()<WKURLSchemeHandler>
@property (nonatomic, strong) NSMutableDictionary *routers;
@end
@implementation WARouter
- (NSMutableDictionary *)routers
{
if (_routers == nil)
{
_routers = [[NSMutableDictionary alloc] init];
}
return _routers;
}
- (void)registerPattern:(NSString *)pattern handle:(RouterHandler)handle
{
[self.routers setValue:[handle copy] forKey:pattern];
}
- (void)webView:(WKWebView *)webView startURLSchemeTask:(id <WKURLSchemeTask>)urlSchemeTask
{
NSURL *url = urlSchemeTask.request.URL;
NSString *scheme = url.scheme;
NSArray *pairs = [url.query componentsSeparatedByString:@"&"];
NSMutableDictionary *params = [[NSMutableDictionary alloc] init];
for (NSString *str in pairs)
{
NSArray *pair = [str componentsSeparatedByString:@"="];
[params setValue:[pair lastObject] forKey:[pair firstObject]];
}
[params addEntriesFromDictionary:urlSchemeTask.request.allHTTPHeaderFields];
RouterHandler handler = [self.routers objectForKey:scheme];
handler(YES, urlSchemeTask, params);
}
- (void)webView:(WKWebView *)webView stopURLSchemeTask:(id <WKURLSchemeTask>)urlSchemeTask
{
NSURL *url = urlSchemeTask.request.URL;
NSString *scheme = url.scheme;
NSArray *pairs = [url.query componentsSeparatedByString:@"&"];
NSMutableDictionary *params = [[NSMutableDictionary alloc] init];
for (NSString *str in pairs)
{
NSArray *pair = [str componentsSeparatedByString:@"="];
[params setValue:[pair lastObject] forKey:[pair firstObject]];
}
[params addEntriesFromDictionary:urlSchemeTask.request.allHTTPHeaderFields];
RouterHandler handler = [self.routers objectForKey:scheme];
handler(NO, urlSchemeTask, params);
}
@end
WKWebview的優化和坑，參考如下
https://juejin.cn/post/6861778055178747911
https://segmentfault.com/a/1190000039111381
https://cloud.tencent.com/developer/article/1005691
WKWebview API全解
https://cloud.tencent.com/developer/article/1485172
