用户接单并等待计费状态，关闭应用再进入应用自动进入等待结束计费页面，有低概率出现地图加载失败地图为黑色或四方格，进入其它页面后再次进入该页面地图显示正常。
由于接单页面图层超多，并且还启动了长连接线程，所以可能接单地图页面在显示时，地图可能没有初始化完毕。
修改方案，对地图的唯一实例在应用启动时就初始画地图，进入接单页面时就直接从地图唯一实例中取就可以了。
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { FLDDLogDebug(@"函数"); launchedFlag = NO; [[SingleAsyncSocket sharedInstance] initData]; . . . } -(void)initData { FLDDLogDebug(@"函数"); //通过判断是否生成管道来防止重复初始化 if(nil == self.endWaitPipe) { //fir [FIR handleCrashWithKey:GENERALKEY]; //友盟分享 [UMSocialData setAppKey:MUMENGKEY]; //友盟统计 [MobClick startWithAppkey:MUMENGKEY reportPolicy:BATCH channelId:@"web"]; [SVProgressHUD setDefaultMaskType:SVProgressHUDMaskTypeClear]; //地图 [MAMapServices sharedServices].apiKey= MAMAPKEY; [AMapNaviServices sharedServices].apiKey =MAMAPKEY; [AMapSearchServices sharedServices].apiKey = MAMAPKEY; NSString *initString = [[NSString alloc] initWithFormat:@"appid=%@",IFLYKEY]; [IFlySpeechUtility createUtility:initString]; [[Singleton sharedInstance] setMAMapViewInstance:[[MAMapView alloc] initWithFrame:CGRectMake(0, 0, kControlWidth, kControlHeight)]]; self.endWaitPipe = [NSPipe pipe]; } } -(void)initMap { MAMapView *namapView = (MAMapView *)([[Singleton sharedInstance] getMAMapViewInstance]); if(nil == namapView) { _mapView = [[MAMapView alloc] initWithFrame:CGRectMake(0, 0, kControlWidth, kControlHeight)]; [[Singleton sharedInstance] setMAMapViewInstance:_mapView]; } else { CGRect newRect = CGRectMake(0, 0, kControlWidth, kControlHeight); namapView.frame = newRect; _mapView = namapView; } _mapView.delegate = self; [self.view addSubview:_mapView]; [self.view sendSubviewToBack:_mapView]; [self initAMapProperty]; //定位 _mapView.showsUserLocation = YES; }
地图唯一实例见文章：
http://blog.csdn.net/jia12216/article/details/49276155
