造成这个冲突的原因是因为 webview的delegete 被置换了，delegate 在arc下都是week ，所以当你使用了NJKWebViewProgress指定了webdelegate，然后又指定 了WebViewJavascriptBridge的webdelegate ，所以两次交替，最终只会一个webdelegate存在。
这里给出解决冲突的原文地址，但是原文给出的方法在设置时不能设置handlerName，这样在特殊条件下无法获取前端发出的callHandler来进行判断
修改后的解决方法Demo下载：
/** Andrew add method to compatible with NJK */
+ (instancetype)bridgeUserNJKForWebView:(WVJB_WEBVIEW_TYPE*)webView handlerName:(NSString*)handlerName handler:(WVJBHandler)messageHandler;
/** Andrew add method to compatible with NJK */
+ (instancetype)bridgeUserNJKForWebView:(WVJB_WEBVIEW_TYPE*)webView handlerName:(NSString*)handlerName handler:(WVJBHandler)messageHandler;
{
WebViewJavascriptBridge *bridge = [[self alloc] init];
[bridge _platformNJKSpecificSetup:webView handlerName:handlerName handler:messageHandler resourceBundle:nil];
return bridge;
}
- (void) _platformNJKSpecificSetup:(WVJB_WEBVIEW_TYPE*)webView handlerName:(NSString*)handlerName handler:(WVJBHandler)messageHandler resourceBundle:(NSBundle*)bundle{
_webView = webView;
_webViewDelegate = nil;
_base = [[WebViewJavascriptBridgeBase alloc] init];
_base.messageHandler = messageHandler;
_base.messageHandlers[handlerName] = [messageHandler copy];
_base.delegate = self;
}
@property (nonatomic, njk_weak) id<UIWebViewDelegate>webBridgeDelegate;
//
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
{
if ([request.URL.absoluteString isEqualToString:completeRPCURLPath]) {
[self completeProgress];
return NO;
}
BOOL ret = YES;
if ([_webViewProxyDelegate respondsToSelector:@selector(webView:shouldStartLoadWithRequest:navigationType:)]) {
ret = [_webViewProxyDelegate webView:webView shouldStartLoadWithRequest:request navigationType:navigationType];
}
if ([_webBridgeDelegate respondsToSelector:@selector(webView:shouldStartLoadWithRequest:navigationType:)]) {
[_webBridgeDelegate webView:webView shouldStartLoadWithRequest:request navigationType:navigationType];
}
BOOL isFragmentJump = NO;
if (request.URL.fragment) {
NSString *nonFragmentURL = [request.URL.absoluteString stringByReplacingOccurrencesOfString:[@"#" stringByAppendingString:request.URL.fragment] withString:@""];
isFragmentJump = [nonFragmentURL isEqualToString:webView.request.URL.absoluteString];
}
BOOL isTopLevelNavigation = [request.mainDocumentURL isEqual:request.URL];
BOOL isHTTP = [request.URL.scheme isEqualToString:@"http"] || [request.URL.scheme isEqualToString:@"https"];
if (ret && !isFragmentJump && isHTTP && isTopLevelNavigation) {
_currentURL = request.URL;
[self reset];
}
return ret;
}
//
- (void)webViewDidStartLoad:(UIWebView *)webView
{
if ([_webViewProxyDelegate respondsToSelector:@selector(webViewDidStartLoad:)]) {
[_webViewProxyDelegate webViewDidStartLoad:webView];
}
if ([_webBridgeDelegate respondsToSelector:@selector(webViewDidStartLoad:)]) {
[_webBridgeDelegate webViewDidStartLoad:webView];
}
_loadingCount++;
_maxLoadCount = fmax(_maxLoadCount, _loadingCount);
[self startProgress];
}
//
- (void)webViewDidFinishLoad:(UIWebView *)webView
{
if ([_webViewProxyDelegate respondsToSelector:@selector(webViewDidFinishLoad:)]) {
[_webViewProxyDelegate webViewDidFinishLoad:webView];
}
if ([_webBridgeDelegate respondsToSelector:@selector(webViewDidFinishLoad:)]) {
[_webBridgeDelegate webViewDidFinishLoad:webView];
}
_loadingCount--;
[self incrementProgress];
NSString *readyState = [webView stringByEvaluatingJavaScriptFromString:@"document.readyState"];
BOOL interactive = [readyState isEqualToString:@"interactive"];
if (interactive) {
_interactive = YES;
NSString *waitForCompleteJS = [NSString stringWithFormat:@"window.addEventListener('load',function() { var iframe = document.createElement('iframe'); iframe.style.display = 'none'; iframe.src = '%@'; document.body.appendChild(iframe); }, false);", completeRPCURLPath];
[webView stringByEvaluatingJavaScriptFromString:waitForCompleteJS];
}
BOOL isNotRedirect = _currentURL && [_currentURL isEqual:webView.request.mainDocumentURL];
BOOL complete = [readyState isEqualToString:@"complete"];
if (complete && isNotRedirect) {
[self completeProgress];
}
}
//
- (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error
{
if ([_webViewProxyDelegate respondsToSelector:@selector(webView:didFailLoadWithError:)]) {
[_webViewProxyDelegate webView:webView didFailLoadWithError:error];
}
if ([_webBridgeDelegate respondsToSelector:@selector(webView:didFailLoadWithError:)]) {
[_webBridgeDelegate webView:webView didFailLoadWithError:error];
}
_loadingCount--;
[self incrementProgress];
NSString *readyState = [webView stringByEvaluatingJavaScriptFromString:@"document.readyState"];
BOOL interactive = [readyState isEqualToString:@"interactive"];
if (interactive) {
_interactive = YES;
NSString *waitForCompleteJS = [NSString stringWithFormat:@"window.addEventListener('load',function() { var iframe = document.createElement('iframe'); iframe.style.display = 'none'; iframe.src = '%@'; document.body.appendChild(iframe); }, false);", completeRPCURLPath];
[webView stringByEvaluatingJavaScriptFromString:waitForCompleteJS];
}
BOOL isNotRedirect = _currentURL && [_currentURL isEqual:webView.request.mainDocumentURL];
BOOL complete = [readyState isEqualToString:@"complete"];
if (complete && isNotRedirect) {
[self completeProgress];
}
}
if (_bridge) {
return;
}
// 开启调试信息
[WebViewJavascriptBridge enableLogging];
// 这里的testObjcCallback是用来判断前端传过来的callHandler
_bridge = [WebViewJavascriptBridge bridgeUserNJKForWebView:self.webView handlerName:@"testObjcCallback" handler:^(id data, WVJBResponseCallback responseCallback) {
// 注意，block里必须使用weakSelf，否则会造成循环引用
NSLog(@"ObjC received message from JS: %@", data);
NSString *dataStr=(NSString *)data;
// ....
}];
// 这里一定要将这个代理设置为_bridge对象
self.progressProxy.webBridgeDelegate = _bridge;