iOS 混合網頁開發 問題

標籤：

　　在利用JavaScriptCore與H5互動時出現異常提示：

This application is modifying the autolayout engine from a background thread, which can lead to engine corruption and weird crashes.  This will cause an exception in a future release.

　　從字面意思看，是因為在後台線程修改了UI，於是乎開始驗證

_weak typeof(self)weakSelf = self;        JSContext *tContext = [weakSelf.webView valueForKeyPath:@"documentView.webView.mainFrame.javaScriptContext"];        tContext[@"jsredirect"] = ^(){                NSArray *tArgs = [JSContext currentArguments];        JSValue *tJSValue = [tArgs firstObject];                @try        {            NSDictionary *tActionValueDic = [tJSValue toDictionary];                        NSLog(@"JSValue:%@", tActionValueDic);                        NSString *tUrlStr = tActionValueDic[@"url"];                        if ([tUrlStr isEqualToString:@"chartDispose"]) {                [[NSUserDefaults standardUserDefaults] setInteger:0 forKey:@"WebKitCacheModelPreferenceKey"];                [[NSUserDefaults standardUserDefaults] setBool:NO forKey:@"WebKitDiskImageCacheEnabled"];                [[NSUserDefaults standardUserDefaults] setBool:NO forKey:@"WebKitOfflineWebApplicationCacheEnabled"];                [[NSUserDefaults standardUserDefaults] synchronize];            }else{                CGGradeJumpWebViewController *vc = [[CGGradeJumpWebViewController alloc]init];                vc.urlStr = tUrlStr;                NSLog(@"Current Thread:%@",[NSThread currentThread]);                dispatch_async(dispatch_get_main_queue(), ^{                    //UI修改                    NSLog(@"Current Thread:%@",[NSThread currentThread]);                    [weakSelf.navigationController pushViewController:vc animated:YES];                });            }                                }        @catch (NSException *exception)        {            NSLog(@"exception:%@", exception);        }    };

果然，在XCode7中網頁互動實在後台線程中執行的(XCode6木有問題)，所以在互動時修改UI要再主線程中執行，問題解決。

 

iOS 混合網頁開發 問題