iOS实现百度地图拖拽后更新位置以及反编码

前言

最近在开发中遇到了百度地图的开发，功能类似于微信中的发送位置，拖拽从新定位，以及反编码，列表附近的位置。分析出来供大家参考学习，下面话不多说了，来一起看看详细的介绍吧。

效果图：

百度地图拖拽更新位置.gif

实现思路

思路就是将一个UIImageView固定在地图中间，每次更新位置，给UIImageView添加动画即可。

代码如下：

#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< result.poiList.count; i++) {
  BMKPoiInfo *info = result.poiList[i];
  FTBMKPoiInfo *ftInfo =[[FTBMKPoiInfo alloc]init];
  ftInfo.address = info.address;
  ftInfo.seleced = NO;
  if (i == 0) {
   ftInfo.seleced = YES;
   self.selectAddress = ftInfo.address;
  }
  [self.dataA addObject:ftInfo];
 }
 [self.tableview reloadData];
}
#pragma mark--- 定位的方法--
- (void)didUpdateUserHeading:(BMKUserLocation *)userLocation
{
 [_mapView updateLocationData:userLocation];
 // NSLog(@"heading is %@",userLocation.heading);
}
-(BMKMapView *)mapView{
 if (!_mapView) {
  _mapView =[[BMKMapView alloc]initWithFrame:CGRectMake(0, NAVH, Device_Width, 350)];
  _mapView.zoomLevel = 18;
  _mapView.minZoomLevel = 3;
  _mapView.maxZoomLevel = 21;
//  BMKLocationViewDisplayParam *displayParam = [[BMKLocationViewDisplayParam alloc]init];
//  displayParam.isRotateAngleValid = true;//跟随态旋转角度是否生效
//  displayParam.isAccuracyCircleShow = false;//精度圈是否显示
//  displayParam.locationViewOffsetX = 0;//定位偏移量(经度)
//  displayParam.locationViewOffsetY = 0;//定位偏移量（纬度）
//  [_mapView updateLocationViewWithParam:displayParam]; 
 }
 return _mapView;
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
 return self.dataA.count;
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
 FTPoiCell *cell =[tableView dequeueReusableCellWithIdentifier:@"cell" forIndexPath:indexPath];
 if (!cell) {
  cell =[[FTPoiCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"cell"];
 }
 FTBMKPoiInfo *info = self.dataA[indexPath.row];
 cell.info = info;
 return cell;
}
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
 [tableView deselectRowAtIndexPath:indexPath animated:YES];
 FTBMKPoiInfo *info = self.dataA[indexPath.row];
 self.selectAddress = info.address;
 [self.dataA enumerateObjectsUsingBlock:^(FTBMKPoiInfo * obj, NSUInteger idx, BOOL * _Nonnull stop) {
  if (obj == info) {
   obj.seleced = YES;
  }else{
   obj.seleced = NO;
  }
  [self.tableview reloadData];
 }];
 if (self.selectBlock) {
  self.selectBlock(self.selectAddress,self.selectedCoordinate);  
  [self.navigationController popViewControllerAnimated:YES];
 } 
}
-(UITableView *)tableview{ 
 if (!_tableview) {
  _tableview =[[UITableView alloc]initWithFrame:CGRectMake(0, self.mapView.bottom, Device_Width, Device_Height - self.mapView.bottom) style:UITableViewStylePlain];
  _tableview.delegate = self;
  _tableview.dataSource = self;
  _tableview.showsVerticalScrollIndicator = NO;
  _tableview.showsHorizontalScrollIndicator = NO;
  _tableview.tableFooterView = [UIView new];
  _tableview.rowHeight = 44;
  [_tableview registerNib:[UINib nibWithNibName:@"FTPoiCell" bundle:nil] forCellReuseIdentifier:@"cell"];
//  [_tableview registerClass:[UITableViewCell class] forCellReuseIdentifier:@"cell"];   
 }
 return _tableview;
}
-(NSMutableArray *)dataA{
 if (!_dataA) {
  _dataA =[NSMutableArray array];
 }
 return _dataA;
}
-(UIImageView *)loactionView{
 if (!_loactionView) {
  _loactionView =[[UIImageView alloc]initWithImage:[UIImage imageNamed:@"ditu_red"]];
  _loactionView.center = CGPointMake(self.mapView.width/2, self.mapView.height/2);  
 }
 return _loactionView;
}
-(LxButton *)poiBackBtn{
 if (!_poiBackBtn) {
  _poiBackBtn =[LxButton LXButtonWithTitle:nil titleFont:nil Image:nil backgroundImage:nil backgroundColor:[UIColor whiteColor] titleColor:nil frame:CGRectMake(Device_Width - 75, self.mapView.height - 75, 50, 50)];
  [_poiBackBtn setFTCornerdious:25];
  UIImageView *imageView =[[UIImageView alloc]initWithImage:[UIImage imageNamed:@"poi_back"]];   
  imageView.center = CGPointMake(25, 25);
  [_poiBackBtn addSubview:imageView];    
 }
 return _poiBackBtn;
}
@end

总结

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