使用百度地圖的時候我們經(jīng)常遇到一些使用情況
A頁面有mapView B頁面也有
今天做了一個這個需求 在Push到B頁面之后B頁面無法拖動

后來發(fā)現(xiàn)坑爹的百度地圖好多代理都是單例
所以要把每一個頁面的代理放到生命周期里

例子

- (void)viewWillAppear:(BOOL)animated{
    [super viewWillAppear:animated];
    [self.mapView viewWillAppear];
    self.mapView.delegate         = self;
    self.locationService.delegate = self;
    self.geoSearcher.delegate     = self;
    self.routeSearch.delegate     = self;
}
- (void)viewWillDisappear:(BOOL)animated{
    [super viewWillDisappear:animated];
    [self.mapView viewWillDisappear];
    self.mapView.delegate         = nil;
    self.locationService.delegate = nil;
    self.geoSearcher.delegate     = nil;
    self.routeSearch.delegate     = nil;
}

這樣B頁面就正常了