uni-app 适配IOS和安卓 持续定位解决方案

针对uni-app适配iOS和安卓的持续定位解决方案，可以通过原生插件或者平台特定的API来实现。由于uni-app支持使用原生代码进行扩展，我们可以编写iOS和安卓的原生模块来处理持续定位需求。下面是一个基本的实现思路和相关代码案例。

1. 编写原生插件

iOS部分

首先，创建一个Objective-C的原生插件。在ios/Classes目录下创建一个新的文件，例如LocationPlugin.h和LocationPlugin.m。

// LocationPlugin.h
#import <Foundation/Foundation.h>
#import <UniAppJSBridge/UniModule.h>

@interface LocationPlugin : NSObject <UniModule>

- (void)startContinuousLocationUpdates:(NSDictionary *)options resolve:(UniPromiseResolveBlock)resolve reject:(UniPromiseRejectBlock)reject;
- (void)stopLocationUpdates;

@end

// LocationPlugin.m
#import "LocationPlugin.h"
#import <CoreLocation/CoreLocation.h>

@interface LocationPlugin () <CLLocationManagerDelegate>

@property (nonatomic, strong) CLLocationManager *locationManager;

@end

@implementation LocationPlugin

- (instancetype)init {
    self = [super init];
    if (self) {
        self.locationManager = [[CLLocationManager alloc] init];
        self.locationManager.delegate = self;
    }
    return self;
}

- (void)startContinuousLocationUpdates:(NSDictionary *)options resolve:(UniPromiseResolveBlock)resolve reject:(UniPromiseRejectBlock)reject {
    [self.locationManager requestAlwaysAuthorization];
    [self.locationManager startUpdatingLocation];
    // Handle location updates in delegate methods
}

- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray<CLLocation *> *)locations {
    // Convert CLLocation to JSON and resolve promise
}

- (void)stopLocationUpdates {
    [self.locationManager stopUpdatingLocation];
}

@end

安卓部分

在android/src/main/java目录下创建一个新的Java类，例如LocationPlugin.java。

// LocationPlugin.java
import android.Manifest;
import android.content.pm.PackageManager;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import io.dcloud.feature.uniapp.common.UniJSCallback;
import io.dcloud.feature.uniapp.bridge.UniJSContext;
import io.dcloud.feature.uniapp.annotation.UniJSMethod;
import io.dcloud.feature.uniapp.bridge.UniModule;

public class LocationPlugin extends UniModule {
    private LocationManager locationManager;

    @UniJSMethod(uiThread = false)
    public void startContinuousLocationUpdates(UniJSCallback callback) {
        locationManager = (LocationManager) getContext().getSystemService(Context.LOCATION_SERVICE);
        // Request permissions and start location updates
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
        // Handle permission results
    }

    private final LocationListener locationListener = new LocationListener() {
        @Override
        public void onLocationChanged(Location location) {
            // Convert Location to JSON and call callback
        }
    };
}

2. 在uni-app中调用原生插件

在uni-app的JavaScript代码中，可以通过uni.requireNativePlugin来调用原生插件的方法。

const locationPlugin = uni.requireNativePlugin('LocationPlugin');

locationPlugin.startContinuousLocationUpdates({}).then(result => {
    console.log('Location:', result);
}).catch(error => {
    console.error('Error:', error);
});

注意：以上代码仅为示例，实际项目中需要根据具体需求完善错误处理、权限请求等逻辑。