項目地址github：<a >HybirdWKWebVIew</a>
HybridNSURLProtocol
一個基于WKWebView的hybirde的容器。能攔截所有WKWKWebView的的css,js,png等網(wǎng)絡(luò)請求的demo
NSURLProtocol 子類，就可以對 app 內(nèi)所有的網(wǎng)絡(luò)請求進行:
[NSURLProtocol registerClass:[HybridNSURLProtocol class]]
可是在 WKWebView 中的請求卻完全不遵從這一規(guī)則，只是象征性+ (BOOL) canInitWithRequest:(NSURLRequest *)request 方法，之后的整個請求流程似乎就與 NSURLProtocol 完全無關(guān)了。
使我WKWebView 的一度認為請求不遵守NSURLProtocol協(xié)議，所以不走 NSURLProtocol。這個也是很苦擾我的問題。導致我們hybird的容器1.0也是是用UIWebVIew實現(xiàn)的。
但在蘋果放在gittub的CustomHTTPProtocol，明顯感覺到WKWebview的也是遵守NSURLProtocol，要不也不會走+ (BOOL)canInitWithRequest:(NSURLRequest *)request;后來一個每天看博客和gittub的習慣幫助了我，找到一個大神的不久前開源庫。
使用了WKBrowsingContextController和registerSchemeForCustomProtocol。 通過反射的方式拿到了私有的 class/selector。通過kvc取到browsingContextController。通過把注冊把 http 和 https 請求交給 NSURLProtocol 處理。
[NSURLProtocol wk_registerScheme:@"http"];
[NSURLProtocol wk_registerScheme:@"https"];
下面直接上源代碼吧
//FOUNDATION_STATIC_INLINE 屬于屬于runtime范疇，你的.m文件需要頻繁調(diào)用一個函數(shù),可以用static inline來聲明。在SDWebImage讀取內(nèi)存的緩存也用到這個聲明。
FOUNDATION_STATIC_INLINE Class ContextControllerClass() {
static Class cls;
if (!cls) {
cls = [[[WKWebView new] valueForKey:@"browsingContextController"] class];
}
return cls;
}
FOUNDATION_STATIC_INLINE SEL RegisterSchemeSelector() {
return NSSelectorFromString(@"registerSchemeForCustomProtocol:");
}
FOUNDATION_STATIC_INLINE SEL UnregisterSchemeSelector() {
return NSSelectorFromString(@"unregisterSchemeForCustomProtocol:");
}
@implementation NSURLProtocol (WebKitSupport)
+ (void)wk_registerScheme:(NSString *)scheme {
Class cls = ContextControllerClass();
SEL sel = RegisterSchemeSelector();
if ([(id)cls respondsToSelector:sel]) {
// 放棄編輯器警告
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Warc-performSelector-leaks"
[(id)cls performSelector:sel withObject:scheme];
#pragma clang diagnostic pop
}
}
+ (void)wk_unregisterScheme:(NSString *)scheme {
Class cls = ContextControllerClass();
SEL sel = UnregisterSchemeSelector();
if ([(id)cls respondsToSelector:sel]) {
// 放棄編輯器警告
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Warc-performSelector-leaks"
[(id)cls performSelector:sel withObject:scheme];
#pragma clang diagnostic pop
}
}
注冊后，客戶端所有請求走+ (BOOL)canInitWithRequest:(NSURLRequest *)request。下面是打印的請求的log
+ (BOOL)canInitWithRequest:(NSURLRequest *)request
{
NSLog(@"request.URL.absoluteString = %@",request.URL.absoluteString);
NSString *scheme = [[request URL] scheme];
if ( ([scheme caseInsensitiveCompare:@"http"] == NSOrderedSame ||
[scheme caseInsensitiveCompare:@"https"] == NSOrderedSame ))
{
//看看是否已經(jīng)處理過了，防止無限循環(huán)
if ([NSURLProtocol propertyForKey:KHybridNSURLProtocolHKey inRequest:request])
return NO;
return YES;
}
return NO;
}
request的重寫定向，request的重寫定向，替換百度知道的log
+ (BOOL)canInitWithRequest:(NSURLRequest *)request
{
NSLog(@"request.URL.absoluteString = %@",request.URL.absoluteString);
NSString *scheme = [[request URL] scheme];
if ( ([scheme caseInsensitiveCompare:@"http"] == NSOrderedSame ||
[scheme caseInsensitiveCompare:@"https"] == NSOrderedSame ))
{
//看看是否已經(jīng)處理過了，防止無限循環(huán)
if ([NSURLProtocol propertyForKey:KHybridNSURLProtocolHKey inRequest:request])
return NO;
return YES;
}
return NO;
}
這里最好加上緩存判斷，加載本地離線文件， 這個直接簡單的例子。
- (void)startLoading
{
NSMutableURLRequest *mutableReqeust = [[self request] mutableCopy];
//給我們處理過的請求設(shè)置一個標識符, 防止無限循環(huán),
[NSURLProtocol setProperty:@YES forKey:KHybridNSURLProtocolHKey inRequest:mutableReqeust];
//這里最好加上緩存判斷，加載本地離線文件， 這個直接簡單的例子。
if ([mutableReqeust.URL.absoluteString isEqualToString:sourIconUrl])
{
NSData* data = UIImagePNGRepresentation([UIImage imageNamed:@"medlinker"]);
NSURLResponse* response = [[NSURLResponse alloc] initWithURL:self.request.URL MIMEType:@"image/png" expectedContentLength:data.length textEncodingName:nil];
[self.client URLProtocol:self didReceiveResponse:response cacheStoragePolicy:NSURLCacheStorageAllowed];
[self.client URLProtocol:self didLoadData:data];
[self.client URLProtocolDidFinishLoading:self];
}
else
{
NSURLSession *session = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration] delegate:self delegateQueue:nil];
self.task = [session dataTaskWithRequest:self.request];
[self.task resume];
}
}
下面是代碼效果圖
項目地址：
github：<a >HybirdWKWebVIew</a>，對您有幫助，歡迎star。
有問題反饋
在使用中有任何問題，歡迎反饋給我，可以用以下聯(lián)系方式跟我交流
- github:<a >LiuShuoyu</a>
接受啟發(fā)的作者的github
github：<a >Yeatse CC</a>
蘋果開發(fā)者文檔：<a >apple</a>
