我的网址映射如下:[mapfrom:@"tt://webPage/(initWithPage:)"toSharedViewController:[WebPageControllerclass]];并且在WebPageController-(id)initWithPage:(WebPage)page{if(self=[superinit]){...然后我在我的代码中多次调用了这个urltt://webPage/1tt://webPage/2tt://webPage/1(stillcalledtheinitWithPage:everytime,notcached)为什么它不被缓存，因为它是