iOS实现百度地图拖拽后更新位置以及反编码

#import "FTBasicController.h"
typedef void (^SelectBlock) (NSString *address,CLLocationCoordinate2D select);
@interface FTUploadAddressController : FTBasicController
@property(nonatomic, copy)SelectBlock selectBlock;
@end
#import "FTUploadAddressController.h"
#import "FTBMKPoiInfo.h"
#import "FTPoiCell.h"
@interface FTUploadAddressController ()@property(nonatomic,strong)BMKLocationService *locService;
@property(nonatomic,strong)BMKUserLocation *userLocation;
@property(nonatomic,strong)BMKMapView *mapView;
@property(nonatomic,strong)UITableView *tableview;
@property(nonatomic,strong)BMKGeoCodeSearch *geocodesearch;
@property(nonatomic,strong)UIImageView *loactionView;
@property(nonatomic,strong)NSMutableArray *dataA;
@property(nonatomic,strong)LxButton *poiBackBtn;
@property(nonatomic,assign)CLLocationCoordinate2D selectedCoordinate;
@property(nonatomic,strong)NSString *selectAddress;
@end
@implementation FTUploadAddressController
-(void)viewWillAppear:(BOOL)animated{
 [super viewWillAppear:animated];
 self.fd_interactivePopDisabled = YES;
 if (!([CLLocationManager authorizationStatus] == kCLAuthorizationStatusAuthorizedAlways || [CLLocationManager authorizationStatus] == kCLAuthorizationStatusAuthorizedWhenInUse) &&[CLLocationManager authorizationStatus] != kCLAuthorizationStatusNotDetermined){
  [self judgeOpenlocation];
 }else{
  [_mapView viewWillAppear];
  _mapView.delegate = self; // 此处记得不用的时候需要置nil，否则影响内存的释放
  _locService.delegate = self;
   _geocodesearch.delegate = self; // 此处记得不用的时候需要置nil，否则影响内存的释放
  _mapView.showsUserLocation = NO;//先关闭显示的定位图层
  _mapView.userTrackingMode = 0;
  _mapView.showsUserLocation = YES;//显示定位图层
  [self.locService startUserLocationService];
 }
}
-(void)judgeOpenlocation{
 UIAlertController *alertVC = [UIAlertController alertControllerWithTitle:@"打开[定位服务]来允许[应用名字]确定您的位置" message:@"请在系统设置中开启定位服务(设置>隐私>定位服务>应用名字>始终)" preferredStyle:UIAlertControllerStyleAlert];
 [alertVC addAction:[UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:nil]];
 [alertVC addAction:[UIAlertAction actionWithTitle:@"去设置" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
  if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 10.000000) {
   //跳转到定位权限页面
   NSURL *url = [NSURL URLWithString:UIApplicationOpenSettingsURLString];
   if( [[UIApplication sharedApplication]canOpenURL:url] ) {
    [[UIApplication sharedApplication] openURL:url];
   }
  }else {
   //跳转到定位开关界面
   NSURL *url = [NSURL URLWithString:@"prefs:root=LOCATION_SERVICES"];
   if( [[UIApplication sharedApplication]canOpenURL:url] ) {
    [[UIApplication sharedApplication] openURL:url];
   }
  }
 }]];
 [self presentViewController:alertVC animated:YES completion:nil];
}
-(void)viewWillDisappear:(BOOL)animated
{
  self.fd_interactivePopDisabled = NO;
 [_mapView viewWillDisappear];
 _mapView.delegate = nil; // 不用时，置nil
 [self.locService stopUserLocationService];
  _geocodesearch.delegate = nil; // 不用时，置nil
 _locService.delegate = nil;
}
- (void)viewDidLoad {
 [super viewDidLoad];
 // Do any additional setup after loading the view.
 self.title = @"所在位置";
  self.locService = [[BMKLocationService alloc]init];
 self.geocodesearch = [[BMKGeoCodeSearch alloc]init];
  [self setup];
  self.navigationItem.leftBarButtonItem =[[UIBarButtonItem alloc]initWithImage:[[UIImage imageNamed:@"return"]imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal] style:UIBarButtonItemStylePlain target:self action:@selector(backReturn)];
}
-(void)backReturn{
 if (self.selectBlock) {
  self.selectBlock(self.selectAddress, self.selectedCoordinate);
  [self.navigationController popViewControllerAnimated:YES];
 }
}
-(void)setup{
  [self.view addSubview:self.mapView];
 [self.view addSubview:self.tableview];
 [self.mapView addSubview:self.loactionView];
 [self.mapView addSubview:self.poiBackBtn];
  [self.poiBackBtn LX_SetShadowPathWith:[UIColor grayColor] shadowOpacity:0.5 shadowRadius:5 shadowSide:LXShadowPathBottom shadowPathWidth:3];
 FTWS(weakSelf);
 [self.poiBackBtn addClickBlock:^(UIButton *button) {
   [weakSelf.mapView setCenterCoordinate:weakSelf.userLocation.location.coordinate];
 }];
}
- (void)didUpdateBMKUserLocation:(BMKUserLocation *)userLocation
{
 //  NSLog(@"didUpdateUserLocation lat %f,long %f",userLocation.location.coordinate.latitude,userLocation.location.coordinate.longitude);
 [_mapView updateLocationData:userLocation];
 self.userLocation = userLocation;
 [self.mapView setCenterCoordinate:userLocation.location.coordinate];
 BMKReverseGeoCodeOption * option = [[BMKReverseGeoCodeOption alloc]init];
 option.reverseGeoPoint = userLocation.location.coordinate;
 BOOL flag = [_geocodesearch reverseGeoCode:option];
 if (flag) { 
 }
 //更新位置之后必须停止定位，
 [_locService stopUserLocationService];
}
-(void)mapView:(BMKMapView *)mapView regionDidChangeAnimated:(BOOL)animated{
 NSLog(@"地图拖动");
 [UIView animateWithDuration:0.30 animations:^{
  self.loactionView.centerY -=8;
 } completion:^(BOOL finished) {
  self.loactionView.centerY +=8;
 }];
 CGPoint touchPoint = self.mapView.center;
 CLLocationCoordinate2D touchMapCoordinate =
 [self.mapView convertPoint:touchPoint toCoordinateFromView:self.mapView];//这里touchMapCoordinate就是该点的经纬度了
 NSLog(@"touching %f,%f",touchMapCoordinate.latitude,touchMapCoordinate.longitude);
 //选择的上传地址
 self.selectedCoordinate = touchMapCoordinate;
 BMKReverseGeoCodeOption * option = [[BMKReverseGeoCodeOption alloc]init];
 option.reverseGeoPoint = touchMapCoordinate;
 BOOL flag = [_geocodesearch reverseGeoCode:option];
 if (flag) { 
 }
}
#pragma mark---获取反编码的数据---
-(void)onGetReverseGeoCodeResult:(BMKGeoCodeSearch *)searcher result:(BMKReverseGeoCodeResult *)result errorCode:(BMKSearchErrorCode)error
{
  BMKAddressComponent *component=[[BMKAddressComponent alloc]init];
  component=result.addressDetail;
 [self.dataA removeAllObjects];
 for (int i =0; i