我正在使用最新的Google Maps API for iOS绘制折线.我正在逐点构造折线,但是当我缩小折线从地图中消失(不是字面上的术语)时,它不能正常渲染,当我放大时,它只会显示线条.
这是放大时折线的显示方式
这是缩小时的显示方式
这里是我绘制折线的功能
RCPolyline *polyline = [[RCPolyline alloc] init]; [polyline drawPolylineFromPoint:self.selectedEmployee.location toPoint:location];
我有覆盖init：为RCPolyline是这样的东西
- (instancetype)init {
self = [super init];
if (self) {
self.strokeWidth = 5.0f;
self.strokeColor = UIColor.redColor;
self.geodesic = YES;
self.map = [RCMapView sharedMapView];
}
return self;}
和drawPolylineFromPoint：toPoint：这样做
- (void)drawPolylineFromPoint:(CLLocation *)pointX toPoint:(CLLocation *)pointY {
GMSMutablePath *path = [GMSMutablePath path];
[path addCoordinate:pointX.coordinate];
[path addCoordinate:pointY.coordinate];
self.path = path;}
解决方法
我发现这个故障,我正在制作RCPolyline类的本地实例,并且正在调用构建折线的方法,我想要的是为RCPolyline实例提供一个全局对象,并为RCPolyline类实例更新GMSPath
这样的：
- (instancetype)initWithMap:(GMSMapView *)mapView {
self = [super init];
if (self) {
self.strokeWidth = 4.0f;
self.strokeColor = [UIColor redColor];
self.geodesic = YES;
self.map = mapView;
self.mutablePath = [GMSMutablePath path];
}
return self;}
- (void)appendPolylineWithCoordinate:(CLLocation *)location {
[self.mutablePath addCoordinate:location.coordinate];
self.path = self.mutablePath;}
PS：RCPolyline是GMSPolyline的子类
