ios出现白屏，怎么回事？

VM135 [publib]:1 App: onLaunch have been invoked

VM135 [publib]:1 App: onShow have been invoked

VM135 [publib]:1 Register: pages/userinfo/main

VM135 [publib]:1 Register: pages/index/main

VM135 [publib]:1 Register: pages/enterpriseLogin/main

VM135 [publib]:1 Register: pages/personalLogin/main

VM135 [publib]:1 Register: pages/my/main

VM135 [publib]:1 On app route: pages/userinfo/main

VM135 [publib]:1 Update view with init data

VM135 [publib]:1 pages/userinfo/main: onLoad have been invoked

VM135 [publib]:1 pages/userinfo/main: onShow have been invoked

VM135 [publib]:1 On app route: pages/index/main

VM135 [publib]:1 pages/userinfo/main: onUnload have been invoked

VM135 [publib]:1 Update view with init data

VM135 [publib]:1 pages/index/main: onLoad have been invoked

VM135 [publib]:1 pages/index/main: onShow have been invoked

VM135 [publib]:1 Invoke event onReady in page: pages/index/main

VM135 [publib]:1 pages/index/main: onReady have been invoked

VM135 [publib]:1 pages/index/main: onHide have been invoked

VM135 [publib]:1 App: onHide have been invoked

不知道怎么回事，急需解救