根据入门指南添加了所有内容。地图加载,我可以毫无问题地将
GMSMarker
添加到地图中。我有一个绘制多边形的方法,但应用程序每次都会崩溃。
方法:
-(void)drawPolygon
{
GMSMutablePath* path = [[GMSMutablePath alloc] init];
[path addCoordinate:CLLocationCoordinate2DMake(-91.13343811039999, 42.6450805664)];
[path addCoordinate:CLLocationCoordinate2DMake(-91.0180969238,42.6452140808)];
[path addCoordinate:CLLocationCoordinate2DMake(-90.8977890015,42.6446838379)];
[path addCoordinate:CLLocationCoordinate2DMake(-90.89622497560001,42.6696586609)];
[path addCoordinate:CLLocationCoordinate2DMake(-90.8959732056,42.6752548218)];
[path addCoordinate:CLLocationCoordinate2DMake(-90.88994598390001,42.6732940674)];
GMSPolygon* poly = [GMSPolygon polygonWithPath:path];
poly.strokeWidth = 2.0;
poly.strokeColor = [UIColor colorWithRed:0.0 green:0.0 blue:0.0 alpha:1.0];
poly.fillColor = [UIColor colorWithRed:0.0 green:0.0 blue:0.0 alpha:0.4];
poly.map = _mapView; //CRASH!!
}
这是一个回溯:
thread #1: tid = 0x1c03, 0x0010ebde Maps`(anonymous namespace)::PolygonInstance::UpdateEntities(float, gmscore::base::reffed_ptr<gmscore::vector::Camera>, gmscore::renderer::EntityRenderer*, (anonymous namespace)::MarkupBehavior*) + 288, stop reason = EXC_BAD_ACCESS (code=2, address=0x4)
frame #0: 0x0010ebde Maps`(anonymous namespace)::PolygonInstance::UpdateEntities(float, gmscore::base::reffed_ptr<gmscore::vector::Camera>, gmscore::renderer::EntityRenderer*, (anonymous namespace)::MarkupBehavior*) + 288
frame #1: 0x00111f3c Maps`(anonymous namespace)::MarkupBehavior::Commit(gmscore::renderer::EntityRenderer*) + 978
frame #2: 0x0008aad2 Maps`gmscore::renderer::EntityRenderer::Draw(bool) + 634
frame #3: 0x000d6a46 Maps`-[GMSEntityRendererView draw] + 200
frame #4: 0x000d5a85 Maps`-[GMSEntityRendererView displayLinkFired:] + 33
frame #5: 0x00144399 Maps`-[GMSDisplayLink displayLinkFired:] + 351
frame #6: 0x00f9e2d2 QuartzCore`CA::Display::DisplayLink::dispatch(unsigned long long, unsigned long long) + 110
frame #7: 0x00f9e75f QuartzCore`CA::Display::TimerDisplayLink::callback(__CFRunLoopTimer*, void*) + 161
frame #8: 0x02519376 CoreFoundation`__CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 22
frame #9: 0x02518e06 CoreFoundation`__CFRunLoopDoTimer + 534
frame #10: 0x02500a82 CoreFoundation`__CFRunLoopRun + 1810
frame #11: 0x024fff44 CoreFoundation`CFRunLoopRunSpecific + 276
frame #12: 0x024ffe1b CoreFoundation`CFRunLoopRunInMode + 123
frame #13: 0x038167e3 GraphicsServices`GSEventRunModal + 88
frame #14: 0x03816668 GraphicsServices`GSEventRun + 104
frame #15: 0x012bfffc UIKit`UIApplicationMain + 1211
frame #16: 0x0000298d Maps`main(argc=1, argv=0xbffff3e0) + 141 at main.m:16
我根本没有尝试使用 MapKit。没有创建其他 OpenGL 上下文。谁能给我提供 GMSPolygon 的工作示例?我相信我的示例遵循官方示例。
使用SDK版本1.3.1。 ARC 已启用。使用情节提要的单视图应用程序。平移/缩放其他一切都可以,只是形状绘制不行。
你们找到解决这个问题的方法了吗?我遇到了完全相同的问题,即使逐字使用 Google Maps SDK for iOS 代码,它仍然崩溃。它在下面的粗体项目上崩溃:
GMSMutablePath *path = [GMSMutablePath path];
[path addCoordinate:CLLocationCoordinate2DMake(37.36, -122.0)];
[path addCoordinate:CLLocationCoordinate2DMake(37.45, -122.0)];
[path addCoordinate:CLLocationCoordinate2DMake(37.45, -122.2)];
[path addCoordinate:CLLocationCoordinate2DMake(37.36, -122.2)];
[path addCoordinate:CLLocationCoordinate2DMake(37.36, -122.0)];
**GMSPolyline *rectangle = [GMSPolyline polylineWithPath:path];**
rectangle.map = mapView_;
编辑:我找到了此行为的解决方案:
要解决此问题,只需将当前代码包装在调度块中即可。原因是,Google Maps SDK 要求所有绘图事件都在主线程上完成。下面的代码可以正常工作:
dispatch_async(dispatch_get_main_queue(), ^{
GMSMutablePath *path = [GMSMutablePath path];
[path addCoordinate:CLLocationCoordinate2DMake(37.36, -122.0)];
[path addCoordinate:CLLocationCoordinate2DMake(37.45, -122.0)];
[path addCoordinate:CLLocationCoordinate2DMake(37.45, -122.2)];
[path addCoordinate:CLLocationCoordinate2DMake(37.36, -122.2)];
[path addCoordinate:CLLocationCoordinate2DMake(37.36, -122.0)];
**GMSPolyline *rectangle = [GMSPolyline polylineWithPath:path];**
rectangle.map = mapView_;
});
我遇到了同样的问题,然后我找到了解决方法:
解决方法:
在 XCode 中,转到产品 > 方案 > 编辑方案...
选择左侧的“运行”选项卡。
选择顶部的“选项”子选项卡。
将“GPU 帧捕获”从“自动启用”或“OpenGL ES”到“金属”或“禁用”。
编辑
在构建路径时,我转换了纬度和经度坐标。
/编辑
我也遇到过同样的bug。我不是从后台线程运行它。我在添加多边形的同时添加标记
marker.map = mapView_; // No problem
polygon.map = mapView_; // Crash
进一步研究。
我被引导到这个问题,我解决了以下问题
let path = GMSMutablePath()
path.add(startCo)
path.add(endCo)
let color = UIColor.black
let polyline = GMSPolyline(path: path)
polyline.strokeWidth = 3
polyline.strokeColor = color
let styles = [GMSStrokeStyle.solidColor(color),
GMSStrokeStyle.solidColor(.clear)]
let lengths: [NSNumber] = [6.0, 6.0]
polyline.spans = GMSStyleSpans(polyline.path!, styles, lengths, .rhumb)
问题是
lengths
是 [6.0, 6.0]
如果线路很长,会占用太多内存并杀死应用程序。这些值需要与线长度成比例。并非所有的线都是直的,取线的最小值和最大值并将长度调整到您认为合适的长度。 Google 的例子是 10000、5000,所以无论是谁设置这个,都是在很小的规模上运行。