blocks|key|1227358|text|您应该使用以下命令创建CLLocation对象：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1227359|-+(id)initWithLatitude:(CLLocationDegrees)latitude
++++longitude:(CLLocationDegrees)longitude;|code-block|syntax|javascript|1227360|然后，您应该能够使用以下命令计算距离|1227361|[location1+distanceFromLocation:location2];|1227362|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

You should create an object of CLLocation using,

<pre><code>- (id)initWithLatitude:(CLLocationDegrees)latitude
 longitude:(CLLocationDegrees)longitude;
</code></pre>

Then, you should be able to calculate the distance using

<pre><code>[location1 distanceFromLocation:location2];
</code></pre>

blocks|key|2952086|text|Swift+5:|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|2952087|extension+CLLocation+{
++++
++++///+Get+distance+between+two+points
++++///
++++///+-+Parameters:
++++///+++-+from:+first+point
++++///+++-+to:+second+point
++++///+-+Returns:+the+distance+in+meters
++++class+func+distance(from:+CLLocationCoordinate2D,+to:+CLLocationCoordinate2D)+->+CLLocationDistance+{
++++++++let+from+=+CLLocation(latitude:+from.latitude,+longitude:+from.longitude)
++++++++let+to+=+CLLocation(latitude:+to.latitude,+longitude:+to.longitude)
++++++++return+from.distance(from:+to)
++++}
}|code-block|syntax|javascript|2952088|entityMap^0|0|8|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

Swift 5:
<pre><code>extension CLLocation {
 
 /// Get distance between two points
 ///
 /// - Parameters:
 /// - from: first point
 /// - to: second point
 /// - Returns: the distance in meters
 class func distance(from: CLLocationCoordinate2D, to: CLLocationCoordinate2D) -&gt; CLLocationDistance {
 let from = CLLocation(latitude: from.latitude, longitude: from.longitude)
 let to = CLLocation(latitude: to.latitude, longitude: to.longitude)
 return from.distance(from: to)
 }
}
</code></pre>

blocks|key|2864658|text|如果您可以以米为单位获取点之间的距离，那么|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2864659|CLLocationCoordinate2D+coordinate1+=+<some+value>
CLLocationCoordinate2D+coordinate2+=+<some+value>
…
MKMapPoint+point1+=+MKMapPointForCoordinate(coordinate1);
MKMapPoint+point2+=+MKMapPointForCoordinate(coordinate2);
CLLocationDistance+distance+=+MKMetersBetweenMapPoints(point1,+point2);|code-block|syntax|javascript|2864660|将返回两点之间的距离。不需要通过给定的CLLocationCoordinate2D创建CLLocation。此定义从iOS+4.0开始可用|offset|length|style|CODE|2864661|entityMap^0|0|0|J|M|17|A|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@$I|R|J|S|K|L]|$I|T|J|U|K|L]]|9|@]|A|$]]|$1|M|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|N|$]]

If it is ok for you to get distance in meters between points, then

<pre><code>CLLocationCoordinate2D coordinate1 = &lt;some value&gt;
CLLocationCoordinate2D coordinate2 = &lt;some value&gt;
…
MKMapPoint point1 = MKMapPointForCoordinate(coordinate1);
MKMapPoint point2 = MKMapPointForCoordinate(coordinate2);
CLLocationDistance distance = MKMetersBetweenMapPoints(point1, point2);
</code></pre>

will return the distance between two points. No needs to create <code>CLLocation</code> by given <code>CLLocationCoordinate2D</code>. This defines are available since iOS 4.0

blocks|key|2864698|text|Swift4:结合了上面的想法|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|2864699|extension+CLLocationCoordinate2D+{
++++//distance+in+meters,+as+explained+in+CLLoactionDistance+definition
++++func+distance(from:+CLLocationCoordinate2D)+->+CLLocationDistance+{
++++++++let+destination=CLLocation(latitude:from.latitude,longitude:from.longitude)
++++++++return+CLLocation(latitude:+latitude,+longitude:+longitude).distance(from:+destination)
++++}
}|code-block|syntax|javascript|2864700|entityMap^0|0|7|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

Swift4: combined above thoughts

<pre><code>extension CLLocationCoordinate2D {
 //distance in meters, as explained in CLLoactionDistance definition
 func distance(from: CLLocationCoordinate2D) -&gt; CLLocationDistance {
 let destination=CLLocation(latitude:from.latitude,longitude:from.longitude)
 return CLLocation(latitude: latitude, longitude: longitude).distance(from: destination)
 }
}
</code></pre>

blocks|key|1227430|text|++++let+point1+=+MKMapPointForCoordinate(myLocation)
++++let+point2+=+MKMapPointForCoordinate(friendLocation)
++++let+distance+=+MKMetersBetweenMapPoints(point1,+point2)/1000
++++let+distanceStr+=+NSString(format:+"%25.3f",+distance)|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1227431|Valleri答案的简单版本。除以1000得到KM，然后转换为字符串。|unstyled|1227432|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

<pre><code> let point1 = MKMapPointForCoordinate(myLocation)
 let point2 = MKMapPointForCoordinate(friendLocation)
 let distance = MKMetersBetweenMapPoints(point1, point2)/1000
 let distanceStr = NSString(format: "%.3f", distance)
</code></pre>

Simple version of Valleri's answer. Divide by 1000 to get KM followed by conversion to string.

blocks|key|2952242|text|Swift+5：计算距离的CLLocationCoordinate2D扩展：|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|2952243|extension+CLLocationCoordinate2D+{
++++///+Returns+distance+from+coordianate+in+meters.
++++///+-+Parameter+from:+coordinate+which+will+be+used+as+end+point.
++++///+-+Returns:+Returns+distance+in+meters.
++++func+distance(from:+CLLocationCoordinate2D)+->+CLLocationDistance+{
++++++++let+from+=+CLLocation(latitude:+from.latitude,+longitude:+from.longitude)
++++++++let+to+=+CLLocation(latitude:+self.latitude,+longitude:+self.longitude)
++++++++return+from.distance(from:+to)
++++}
}|code-block|syntax|javascript|2952244|用法：|2952245|let+coordinate+=+CLLocationCoordinate2D(latitude:+11,+longitude:+39)
let+from+=+CLLocationCoordinate2D(latitude:+30,+longitude:+43)
let+distance+=+coordinate.distance(from:+from)|2952246|entityMap^0|0|7|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|T|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|U|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|V|8|@]|D|@]|E|$I|J]]|$1|O|3|-4|5|6|7|W|8|@]|D|@]|E|$]]]|P|$]]

Swift 5: CLLocationCoordinate2D extension to calculate distance:
<pre><code>extension CLLocationCoordinate2D {
 /// Returns distance from coordianate in meters.
 /// - Parameter from: coordinate which will be used as end point.
 /// - Returns: Returns distance in meters.
 func distance(from: CLLocationCoordinate2D) -&gt; CLLocationDistance {
 let from = CLLocation(latitude: from.latitude, longitude: from.longitude)
 let to = CLLocation(latitude: self.latitude, longitude: self.longitude)
 return from.distance(from: to)
 }
}
</code></pre>
Usage:
<pre><code>let coordinate = CLLocationCoordinate2D(latitude: 11, longitude: 39)
let from = CLLocationCoordinate2D(latitude: 30, longitude: 43)
let distance = coordinate.distance(from: from)
</code></pre>

blocks|key|1667130|text|基于MapKit的Swift+5.5的CLLocationCoordinate2D%2BDistance.swift|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1667131|import+MapKit

extension+CLLocationCoordinate2D+{

++++///+Returns+the+distance+between+two+coordinates+in+meters.
++++func+distance(to:+CLLocationCoordinate2D)+->+CLLocationDistance+{
++++++++MKMapPoint(self).distance(to:+MKMapPoint(to))
++++}

}|code-block|syntax|javascript|1667132|基于CLLocation的版本|1667133|import+CoreLocation

extension+CLLocationCoordinate2D+{

++++///+Returns+the+distance+between+two+coordinates+in+meters.
++++func+distance(to:+CLLocationCoordinate2D)+->+CLLocationDistance+{
++++++++CLLocation(latitude:+latitude,+longitude:+longitude)
++++++++++++.distance(from:+CLLocation(latitude:+to.latitude,+longitude:+to.longitude))
++++}

}|1667134|这两个扩展都有性能开销，如果处理大量坐标，这可能是相关的。在这些情况下：|1667135|在Euclid+package中有一个对CLLocationCoordinate2D的扩展，它直接执行计算，请参阅：distance(to:)|1667136|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/timsearle/Euclid|1|https://github.com/timsearle/Euclid/blob/master/Sources/Euclid.swift#L159^0|2|6|J|11|0|0|2|A|0|0|0|1|E|0|1M|D|1|0^^$0|@$1|2|3|4|5|6|7|12|8|@$9|13|A|14|B|C]|$9|15|A|16|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|17|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|18|8|@$9|19|A|1A|B|C]]|D|@]|E|$]]|$1|M|3|N|5|H|7|1B|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|1C|8|@]|D|@]|E|$]]|$1|Q|3|R|5|6|7|1D|8|@]|D|@$9|1E|A|1F|1|1G]|$9|1H|A|1I|1|1J]]|E|$]]|$1|S|3|-4|5|6|7|1K|8|@]|D|@]|E|$]]]|T|$U|$5|V|W|X|E|$Y|Z]]|10|$5|V|W|X|E|$Y|11]]]]

<code>CLLocationCoordinate2D+Distance.swift</code> for Swift 5.5 based on <code>MapKit</code>:
<pre class="lang-swift prettyprint-override"><code>import MapKit

extension CLLocationCoordinate2D {

 /// Returns the distance between two coordinates in meters.
 func distance(to: CLLocationCoordinate2D) -&gt; CLLocationDistance {
 MKMapPoint(self).distance(to: MKMapPoint(to))
 }

}
</code></pre>
Version based on <code>CLLocation</code>:
<pre class="lang-swift prettyprint-override"><code>import CoreLocation

extension CLLocationCoordinate2D {

 /// Returns the distance between two coordinates in meters.
 func distance(to: CLLocationCoordinate2D) -&gt; CLLocationDistance {
 CLLocation(latitude: latitude, longitude: longitude)
 .distance(from: CLLocation(latitude: to.latitude, longitude: to.longitude))
 }

}
</code></pre>
Both extensions have a performance overhead which might be relevant if processing a large amount of coordinates. In those cases:
There is an extension to CLLocationCoordinate2D in the <a href="https://github.com/timsearle/Euclid" rel="nofollow noreferrer">Euclid package</a> which performs the computation directly, see: <a href="https://github.com/timsearle/Euclid/blob/master/Sources/Euclid.swift#L159" rel="nofollow noreferrer">distance(to:)</a>

blocks|key|2952195|text|CLLocationDistance是以米为单位的度量单位。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2952196|let+point1+=+CLLocationCoordinate2D(latitude:+lat1,+longitude:+lon1)
let+point2+=+CLLocationCoordinate2D(latitude:+lat2,+longitude:+lon2)
let+distance+=+point1.distance(to:+point2)|code-block|syntax|javascript|2952197|entityMap^0|0|I|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

<code>CLLocationDistance</code> is a measurement in meters.

<pre><code>let point1 = CLLocationCoordinate2D(latitude: lat1, longitude: lon1)
let point2 = CLLocationCoordinate2D(latitude: lat2, longitude: lon2)
let distance = point1.distance(to: point2)
</code></pre>

I know from documentation we can find distance between two <code>CLLocation</code> points using the function, <code>distanceFromLocation:</code>. But my problem is I dont have CLLocation data type with me, I have the CLLocationCoordinate2D points. So how can I find distance between two CLLocationCoordinate2D points. I have seen the post <a href="https://stackoverflow.com/questions/3905896/distancefromlocation-calculate-distance-between-two-points">post</a> but not helpful for me.

Finding distance between CLLocationCoordinate2D points

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我从文档中了解到，我们可以使用函数distanceFromLocation:来计算两个CLLocation点之间的距离。但我的问题是我没有CLLocation数据类型，我有CLLocationCoordinate2D点。那么如何找到两个CLLocationCoordinate2D点之间的距离呢？我看过的帖子，但对我没有帮助。

问查找CLLocationCoordinate2D点之间的距离
EN

回答 8

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问查找CLLocationCoordinate2D点之间的距离EN

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问查找CLLocationCoordinate2D点之间的距离
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