因需求需要将高德定位集成进项目后,调用单次定位的方法,但发现获取定位方法回调数据很慢很慢 。。。
/**
* @brief 单次定位。如果当前正在连续定位,调用此方法将会失败,返回NO。\n该方法将会根据设定的 desiredAccuracy 去获取定位信息。如果获取的定位信息精确度低于 desiredAccuracy ,将会持续的等待定位信息,直到超时后通过completionBlock返回精度最高的定位信息。\n可以通过 stopUpdatingLocation 方法去取消正在进行的单次定位请求。
* @param withReGeocode 是否带有逆地理信息(获取逆地理信息需要联网)
* @param completionBlock 单次定位完成后的Block
* @return 是否成功添加单次定位Request
*/
- (BOOL)requestLocationWithReGeocode:(BOOL)withReGeocode completionBlock:(AMapLocatingCompletionBlock)completionBlock;
期间尝试过一些方法后,最终发现高德它是真的慢,但是也要解决问题呀,通过一通折腾后发现了一些路数;
解决办法
在初始化的时候有一个设置定位精准度的属性(即:setDesiredAccuracy),经过几经尝试,发现如下规律;
extern const CLLocationAccuracy kCLLocationAccuracyBestForNavigation API_AVAILABLE(ios(4.0), macos(10.7));
extern const CLLocationAccuracy kCLLocationAccuracyBest;
extern const CLLocationAccuracy kCLLocationAccuracyNearestTenMeters;
extern const CLLocationAccuracy kCLLocationAccuracyHundredMeters;
extern const CLLocationAccuracy kCLLocationAccuracyKilometer;
extern const CLLocationAccuracy kCLLocationAccuracyThreeKilometers;
设置为 Best 的时候定位大概耗时 8 秒;
设置为 NearestTenMeters 的时候定位大概耗时 5 秒;
设置为 HundredMeters 的时候定位大概耗时 2 秒;
设置为 ThreeKilometers 的时候定位大概秒定位到;
那么通过如上规律得知,精度约广耗时也就随之约短,那么也不能一味的为了减少耗时而过于降低定位的精准度;
最终依次将几个版本的精准度分别打包后安装在真机上尝试,发现前三项(即:Best、NearestTenMeters、HundredMeters)所获取到的定位数据信息一致,基本无偏差,故综合考量选择了耗时较短的 HundredMeters;
/**
高德定位初始化
*/
- (void)settingGaoDeConfig {
[AMapServices sharedServices].apiKey = APPKEY_GaoDe;
locationManagerGaoDe = [[AMapLocationManager alloc] init];
// [locationManagerGaoDe setDesiredAccuracy:kCLLocationAccuracyBest];// 8 5 2
// [locationManagerGaoDe setDesiredAccuracy:kCLLocationAccuracyNearestTenMeters];
[locationManagerGaoDe setDesiredAccuracy:kCLLocationAccuracyHundredMeters];
[locationManagerGaoDe setPausesLocationUpdatesAutomatically:NO];
[locationManagerGaoDe setAllowsBackgroundLocationUpdates:YES];
[locationManagerGaoDe setReGeocodeTimeout:5.f];
[locationManagerGaoDe setLocationTimeout:5.f];
[locationManagerGaoDe setDelegate:self];
}
/**
获取定位数据
@param sn 交互协议
@param webView 控件
*/
- (void)getCurrentPositionBySnWith:(NSString *)sn AndWebView:(WKWebView *)webView {
[locationManagerGaoDe requestLocationWithReGeocode:YES completionBlock:^(CLLocation *location, AMapLocationReGeocode *regeocode, NSError *error) {
NSLog(@"************ GaoDe 定位数据 ************");
NSLog(@"%@", location);
NSLog(@"纬度 %f", location.coordinate.latitude);
NSLog(@"精度 %f", location.coordinate.longitude);
NSLog(@"%@", regeocode);
NSLog(@"%@", error);
NSMutableDictionary *dict = [NSMutableDictionary dictionary];
NSUInteger code = 0;
if (error) {
code = -1;
[dict setObject:[NSNumber numberWithInteger:-1] forKey:@"code"];
} else {
[dict setValue:regeocode.formattedAddress forKey:@"address"];
[dict setValue:regeocode.country forKey:@"country"];
[dict setValue:regeocode.adcode forKey:@"adCode"];
[dict setObject:[NSNumber numberWithFloat:location.coordinate.longitude] forKey:@"longitude"];
[dict setValue:regeocode.city forKey:@"city"];
[dict setValue:regeocode.district forKey:@"district"];
[dict setObject:[NSNumber numberWithFloat:location.coordinate.latitude] forKey:@"latitude"];
[dict setValue:regeocode.province forKey:@"province"];
[dict setValue:regeocode.citycode forKey:@"cityCode"];
[dict setObject:[NSNumber numberWithInteger:code] forKey:@"code"];
}
NSLog(@"************ GaoDe 定位数据回调 ************\n%@", dict);
// Callback
[WKWebView appCallWebWithServiceResultToJsonSn:sn AndDataSourceObject:dict WithWKView:webView];
}];
}
以上便是此次分享的内容,希望对大家有所帮助!