移除不需要再显示的视图控制器打赏

- (void)removeBulidPhotoAlbumController{
NSMutableArray *removeArr = @[].mutableCopy;
for (int i=0; i<self.navigationController.childViewControllers.count; i++) {
    id controller = self.navigationController.childViewControllers[i];
    if ([controller isKindOfClass:[BulidPhotoAlbumController class]]) {
        [removeArr addObject:controller];
    }
}

NSMutableArray *tempArr = self.navigationController.childViewControllers.mutableCopy;
for (int i=0; i<removeArr.count; i++) {
    id controller = removeArr[i];
    [tempArr removeObject:controller];
}
[self.navigationController setViewControllers:tempArr]; }