写在前面: 尽管精确度已然调至最佳, 但还是会有一定程度的定位误差, 作为开发者我已然尽力, 只能希望apple官方做些优化吧
输入目的地地址时最好填入区, 不然有时会定位不到
http://developer.baidu.com/map/wiki/index.php?title=uri/api/ios
这个网址是百度地图官方的, 提供web和ios跳转到百度地图app的各种url, 诸如可以输入起点终点进行导航, 或者把输入的地址显示在百度地图上等等
下面这个对地址反编译成经纬度就已经要用到了, 更别说后面的定位了
#import <CoreLocation/CoreLocation.h>
要调用自带的高德地图, 就要
#import <MapKit/MapKit.h>
我的demo控件只是创建了一个开始跳转到地图的按钮和输入目的地的textField而已
以下是属性
@property (nonatomic, strong) UITextField *textField;
@property (nonatomic, strong) UIButton *buttonOfBeginLocate;
//目的地经纬度
@property (nonatomic, assign) CGFloat longitude;
@property (nonatomic, assign) CGFloat latitude;
//目前所在地经纬度
@property (nonatomic, assign) CGFloat currentLatitude;
@property (nonatomic, assign) CGFloat currentLongitude;
@property (nonatomic, strong) CLLocationManager *locationManager;
@property (nonatomic, strong) CLGeocoder *geocoder;
写俩懒加载
#pragma mark - 懒加载
- (CLLocationManager *)locationManager{
if (!_locationManager) {
_locationManager = [[CLLocationManager alloc] init];
_locationManager.delegate = self;
// 设置定位精确度到米
_locationManager.desiredAccuracy = kCLLocationAccuracyBest;
// 设置过滤器为无
_locationManager.distanceFilter = kCLDistanceFilterNone;
// 一个是requestAlwaysAuthorization，一个是requestWhenInUseAuthorization
[_locationManager requestWhenInUseAuthorization];//这句话ios8以上版本使用。
}
return _locationManager;
}
- (CLGeocoder *)geocoder{
if (!_geocoder) {
_geocoder = [[CLGeocoder alloc] init];
}
return _geocoder;
}
在button点击事件里
- (void)beginLocate:(UIButton *)button{
[self.locationManager startUpdatingLocation];
[self translateAddress];
//设备安装了百度地图
if ([[UIApplication sharedApplication] canOpenURL:[NSURL URLWithString:@"baidumap://map/"]]){
[self dumpToBaidu];
}
//没安装百度地图, 跳转到自带的高德
else{
[self testAppleMapWithLatitude:_latitude longitude:_longitude];
}
}
#pragma mark - 定位协议方法
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation{
_currentLatitude = newLocation.coordinate.latitude;
_currentLongitude = newLocation.coordinate.longitude;
if (_currentLatitude && _currentLongitude) {
[manager stopUpdatingLocation];
}
}
#pragma mark - 目的地地址编译为经纬度.
//地址尽量有区, 比如龙湖区
- (void)translateAddress{
[self.geocoder geocodeAddressString:_textField.text completionHandler:^(NSArray<CLPlacemark *> * _Nullable placemarks, NSError * _Nullable error) {
if (placemarks.count > 0 && error == nil) {
CLPlacemark *placemark = placemarks.firstObject;
_longitude = placemark.location.coordinate.longitude;
_latitude = placemark.location.coordinate.latitude;
}
else if (placemarks.count == 0 && error == nil){
NSLog(@"placemarks元素为0");
}else if(error != nil){
NSLog(@"an arror occurred = %@", error);
}
}];
}
#pragma mark - 跳转到百度地图
- (void)dumpToBaidu{
//转成UTF8 [NSCharacterSet URLQueryAllowedCharacterSet]
//四个参数分别是, 当前位置纬度, 经度, 目的地纬度, 经度
NSString *url4 = [[NSString stringWithFormat:@"baidumap://map/direction?origin=%f,%f&destination=%f,%f&mode=driving&src=webapp.navi.yourCompanyName.yourAppName", _currentLatitude, _currentLongitude, _latitude, _longitude] stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLQueryAllowedCharacterSet]];
//根据起点终点跳转到百度地图并进行驾车导航
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:url4]];
}
#pragma mark - 跳转到苹果高德地图
-(void)testAppleMapWithLatitude:(CGFloat)latitude longitude:(CGFloat)longitude{
// CLLocationCoordinate2D coords1 = CLLocationCoordinate2DMake(30.691793,104.088264);
// CLLocationCoordinate2D coords2 = CLLocationCoordinate2DMake(30.691293,104.088264);
CLLocationCoordinate2D coords1 = CLLocationCoordinate2DMake(_currentLatitude, _currentLongitude);
// CLLocationCoordinate2D coords2 = CLLocationCoordinate2DMake(40.001,116.404);
CLLocationCoordinate2D coords2 = CLLocationCoordinate2DMake(latitude, longitude);
//这个判断我没试过, 现在也没几个用ios6了吧
if ([[[UIDevice currentDevice] systemVersion] floatValue] < 6.0){
// ios6以下，调用google map {
NSString *urlString = [[NSString alloc] initWithFormat:@"http://maps.google.com/maps?saddr=%f,%f&daddr=%f,%f&dirfl=d", coords1.latitude,coords1.longitude,coords2.latitude,coords2.longitude];
NSURL *aURL = [NSURL URLWithString:urlString]; //打开网页google地图
[[UIApplication sharedApplication] openURL:aURL];
}else// 直接调用ios自己带的apple map
{
//当前的位置
// MKMapItem *currentLocation = [MKMapItem mapItemForCurrentLocation];
//起点
MKMapItem *currentLocation = [[MKMapItem alloc] initWithPlacemark:[[MKPlacemark alloc] initWithCoordinate:coords1 addressDictionary:nil]];
currentLocation.name = @"目前位置";
//目的地的位置
MKMapItem *toLocation = [[MKMapItem alloc] initWithPlacemark:[[MKPlacemark alloc] initWithCoordinate:coords2 addressDictionary:nil]];
//显示在地图上的目的地名称
toLocation.name = @"目的地";
NSArray *items = [NSArray arrayWithObjects:currentLocation, toLocation, nil];
NSDictionary *options = @{
MKLaunchOptionsDirectionsModeKey:MKLaunchOptionsDirectionsModeDriving, MKLaunchOptionsMapTypeKey: [NSNumber numberWithInteger:MKMapTypeStandard], MKLaunchOptionsShowsTrafficKey:@YES
}; //打开苹果自身地图应用，并呈现特定的item
[MKMapItem openMapsWithItems:items launchOptions:options];
}
}
最后感谢 http://blog.csdn.net/hengshujiyi/article/details/45560609 给我灵感
