Question

我正在尝试将MKPolyLine添加到我的mapView中。但得到错误：NSInvalidArgumentException', reason: '-[MKPolylineView boundingMapRect] 我的代码：

- (void)addRoad {
    [self loadRoude];
    [self.mapView addOverlay:self.routeLine];
}

- (void)loadRoude{
    MKMapPoint northEastPoint = MKMapPointForCoordinate(self.mapView.userLocation.coordinate);
MKMapPoint southWestPoint = MKMapPointMake(52.142391, 21.055641);

    MKMapPoint* pointArr = malloc(sizeof(CLLocationCoordinate2D) * 2);
    pointArr[0] = northEastPoint;
    pointArr[1] = southWestPoint;

    self.routeLine = [MKPolyline polylineWithPoints:pointArr count:2];
    _routeRect = MKMapRectMake(southWestPoint.x, southWestPoint.y, northEastPoint.x - southWestPoint.x, northEastPoint.y - southWestPoint.y);
    free(pointArr);
}

- (MKOverlayView *)mapView:(MKMapView *)mapView viewForOverlay:(id <MKOverlay>)overlay
{
MKOverlayView* overlayView = nil;

if(overlay == self.routeLine)
{
        if(nil == self.routeLineView)
    {
        self.routeLineView = [[MKPolylineView alloc] initWithPolyline:self.routeLine];
        self.routeLineView.fillColor = [UIColor redColor];
        self.routeLineView.strokeColor = [UIColor redColor];
        self.routeLineView.lineWidth = 3;
    }
    overlayView = self.routeLineView;
}
return overlayView; 
}

有我的问题吗？

修改

self.routeLineView的NSLog向我显示：outeLiveView = <MKPolylineView: 0x7c956d0; frame = (0 0; 0 0); opaque = NO; layer = <MKOverlayClusterProxyLayer: 0x7c97eb0>>这是正常的吗？

EDIT2

NSLog(@"pointArr[0]x = %f",pointArr[0].x);
NSLog(@"pointArr[0]y = %f",pointArr[0].y);
NSLog(@"pointArr[1]x = %f",pointArr[1].x);
NSLog(@"pointArr[1]y = %f",pointArr[1].y);

显示：

pointArr[0]x = 149891376.014222
pointArr[0]y = 88510604.996837
pointArr[1]x = 149917951.870020
pointArr[1]y = 88495551.883086

这意味着我的指针数组没有nil对象。我真的很震惊

Answer 1

来自Apple的文档：

NSInvalidArgumentException：您遇到的异常的名称将无效参数传递给方法，例如nil指针所在的位置非零对象是必需的。适用于Mac OS X v10.0及更高版本。

检查您用于初始化routeLineView或任何其他MKPolylineView个对象的值。一个可能是nil。

添加MKPolyLine NSInvalidArgumentException

1 个答案: