Question

我正在开发使用Google Map SDK，Firebase和Geofire的iOS Taxi应用程序。我需要显示出租车司机在乘客位置周围的实时移动，当他/她在地图上更改他的取件位置时（这发生在乘客要求租用之前，只是检查用户位置周围的司机附近）。

我已成功将geofire集成到应用程序中，但我想知道如何在地图上平滑移动标记。是否只能删除地图上的所有标记并逐个添加它们，我认为这是一个糟糕的实现。还有更好的选择吗？

//The location of a key now matches the query criteria.
GFQuery *query = [geoFire queryAtLocation:L(coor.latitude, coor.longitude) withRadius:1];
[query observeEventType:GFEventTypeKeyEntered withBlock:^(NSString *key, CLLocation *location) {
    NSLog(@"Entered Key '%@' entered the search area and is at location '%@'", key, location);
    //Remove all markers and add location received from this block?
}];

//The location of a key no longer matches the query criteria.
[query observeEventType:GFEventTypeKeyExited withBlock:^(NSString *key, CLLocation *location) {
    NSLog(@"Exited Key '%@' entered the search area and is at location '%@'", key, location);
    //Remove all markers and add location received from this block?
}];

//The location of a key changed but the location still matches the query criteria.
[query observeEventType:GFEventTypeKeyMoved withBlock:^(NSString *key, CLLocation *location) {
    NSLog(@"Moved Key '%@' entered the search area and is at location '%@'", key, location);
    //Remove all markers and add location received from this block?
}];

如果有人这样做，请先提供一些示例代码段，以更好的方式实现这一点。

Answer 1

删除地图上的所有标记并再次添加它们将是严重不好的解决方案。您可以使用GMSMarker的位置属性来移动您的标记，并使用CATransaction来提供移动效果。

Eg. Mall moveMarkerPositionWithMotion method to change location of your marker

-(void)moveMarkerPositionWithMotion {
    [CATransaction begin];
    NSTimeInterval nAnimationDuration = 1; // Update this value as per your needs.
    [CATransaction setAnimationDuration:nAnimationDuration];
    marker.position = coordindates;
    [CATransaction commit];
}

在Google Map iOS上使用来自Firebase - GeoFire的位置数据移动地图标记？

1 个答案: