绘制海量点图层 最后更新时间: 2021年01月22日

///根据file读取出经纬度数组
NSString *file = [[NSBundle mainBundle] pathForResource:@"10w" ofType:@"txt"];
NSString *locationString = [NSString stringWithContentsOfFile:file encoding:NSUTF8StringEncoding error:nil];
NSArray *locations = [locationString componentsSeparatedByString:@"\n"];
///创建MultiPointItems数组,并更新数据
NSMutableArray *items = [NSMutableArray array];
for (int i = 0; i < locations.count; ++i)
{
 @autoreleasepool {
 MAMultiPointItem *item = [[MAMultiPointItem alloc] init];
 
 NSArray *coordinate = [locations[i] componentsSeparatedByString:@","];
 
 if (coordinate.count == 2)
 {
 item.coordinate = CLLocationCoordinate2DMake([coordinate[1] floatValue], [coordinate[0] floatValue]);
 
 [items addObject:item];
 }
 }
}
///根据items创建海量点Overlay MultiPointOverlay
 MAMultiPointOverlay *_overlay = [[MAMultiPointOverlay alloc] initWithMultiPointItems:items];
///把Overlay添加进mapView
[self.mapView addOverlay:_overlay];

///根据file读取出经纬度数组
let file = Bundle.main.path(forResource: "10w", ofType: "txt")
guard let locationString = try? String(contentsOfFile: file!) else {
 return
}
let locations = locationString.components(separatedBy: "\n")
///创建MultiPointItems数组,并更新数据
var items = [MAMultiPointItem]()
 
for oneLocation in locations {
 let item = MAMultiPointItem()
 
 let coordinate = oneLocation.components(separatedBy: ",")
 
 if (coordinate.count == 2)
 {
 item.coordinate = CLLocationCoordinate2D(latitude: Double(coordinate[1])!, longitude: Double(coordinate[0])!)
 items.append(item)
 }
}
///根据items创建海量点Overlay MultiPointOverlay
var overlay: MAMultiPointOverlay! = MAMultiPointOverlay(multiPointItems: items)
///把Overlay添加进mapView
self.mapView.add(self.overlay)

- (MAOverlayRenderer *)mapView:(MAMapView *)mapView rendererForOverlay:(id <MAOverlay>)overlay
{
 if ([overlay isKindOfClass:[MAMultiPointOverlay class]])
 {
 MAMultiPointOverlayRenderer * renderer = [[MAMultiPointOverlayRenderer alloc] initWithMultiPointOverlay:overlay];
 
 ///设置图片
 renderer.icon = [UIImage imageNamed:@"marker_blue"];
 ///设置锚点
 renderer.anchor = CGPointMake(0.5, 1.0);
 renderer.delegate = self;
 return renderer;
 }
 
 return nil;
}

func mapView(_ mapView: MAMapView!, rendererFor overlay: MAOverlay!) -> MAOverlayRenderer! {
 
 if (overlay.isKind(of: MAMultiPointOverlay.self))
 {
 let renderer = MAMultiPointOverlayRenderer(multiPointOverlay: overlay as! MAMultiPointOverlay!)
 renderer!.delegate = self
 ///设置图片
 renderer!.icon = UIImage(named: "marker_blue")
 ///设置锚点
 renderer!.anchor = CGPoint(x: 0.5, y: 1.0)
 return renderer;
 }
 
 return nil;
}

- (void)multiPointOverlayRenderer:(MAMultiPointOverlayRenderer *)renderer didItemTapped:(MAMultiPointItem *)item
{
 NSLog(@"item :%@ <%f, %f>", item, item.coordinate.latitude, item.coordinate.longitude);
}

func multiPointOverlayRenderer(_ renderer: MAMultiPointOverlayRenderer!, didItemTapped item: MAMultiPointItem!) {
 print("item :\(item) <\(item.coordinate)>")
}