openInMapsWithLaunchOptions不起作用？

Apple的文档没有提到它,但是从测试来看,似乎openInMapsWithLaunchOptions()忽略了MKLaunchOptionsMapSpanKey如果将一个或多个MKMapItem添加到地图中的选项.

以下代码按预期工作,修改距离参数时正确调整地图缩放(尝试使用1000和10000000,以查看差异):

func openMapForPlace() {
    let regionDistance: CLLocatiOnDistance= 10000000
    let coordinates = CLLocationCoordinate2DMake(40, 0)
    let regiOnSpan= MKCoordinateRegionMakeWithDistance(coordinates, regionDistance, regionDistance)
    let optiOns= [
        MKLaunchOptionsMapCenterKey: NSValue(MKCoordinate: regionSpan.center),
        MKLaunchOptionsMapSpanKey: NSValue(MKCoordinateSpan: regionSpan.span)
    ]

    MKMapItem.openMapsWithItems([], launchOptions: options)
}

但是,只要将一个MKMapItem添加到地图中,缩放就会停止工作.

func openMapForPlace() {
    let regionDistance: CLLocatiOnDistance= 10000000
    let coordinates = CLLocationCoordinate2DMake(40, 0)
    let regiOnSpan= MKCoordinateRegionMakeWithDistance(coordinates, regionDistance, regionDistance)
    let optiOns= [
        MKLaunchOptionsMapCenterKey: NSValue(MKCoordinate: regionSpan.center),
        MKLaunchOptionsMapSpanKey: NSValue(MKCoordinateSpan: regionSpan.span)
    ]

    let placemark = MKPlacemark(coordinate: coordinates, addressDictionary: nil)
    let mapItem = MKMapItem(placemark: placemark)
    mapItem.name = "Test"

    MKMapItem.openMapsWithItems([mapItem], launchOptions: options)
}