摘要： -(void)viewWillDisappear:(BOOL)animated { if([self.navigationController.viewControllersindexOfObject:self]==NSNotFound) { //backbuttonwaspressed.Weknowthisistruebecauseselfisnolonger //inthenavigationstack. NSLog(@"viewWillDisappear:(BOOL)animated"); if(request) { [requestclearDelegatesAnd 阅读全文