如何在mapView中添加折线

本文介绍了如何在mapView中添加折线的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我会在地图视图中插入一条折线！ 我是用这种方式做到的

I would insert in my mapview an polyline! I made it in this way

CLLocationCoordinate2D coord[2]; coord[1].latitude = 45.42207; coord[1].longitude = 9.123888; coord[2].latitude = 45.422785; coord[2].longitude = 9.12377; MKPolyline *polyline = [[MKPolyline alloc] init]; polyline = [MKPolyline polylineWithCoordinates:coord count:2]; [self.mapView addAnnotation:polyline];

但是不起作用，并出现以下错误:EXC_BAD_ACCESS. 怎么了?

But don't work and there's this error: EXC_BAD_ACCESS. What's it wrong?

推荐答案

尝试一下

CLLocationCoordinate2D coord[2]; coord[0].latitude = 45.42207; coord[0].longitude = 9.123888; coord[1].latitude = 45.422785; coord[1].longitude = 9.12377; MKPolyline *polyline = [[MKPolyline alloc] init]; polyline = [MKPolyline polylineWithCoordinates:coord count:2]; - (MKOverlayView *)mapView:(MKMapView *)mapView viewForOverlay:(id <MKOverlay>)overlay { MKPolylineView *polyLineView = [[MKPolylineView alloc] initWithPolyline:polyline]; polyLineView.fillColor = [UIColor blueColor]; polyLineView.strokeColor = [UIColor greenColor]; polyLineView.lineWidth = 7; return polyLineView; }