伙计们,
我正在尝试获得如下图所示的实用程序.基本上,相机显示窗口覆盖设备屏幕的一部分,并且通过曲线或直线连接的点列表在相机视图上呈现为叠加.我知道这可以用石英绘制,但这不到我问题的一半.
真正的问题是,当轴承和高度发生变化时,叠加应该呈现不同的点.
例如:
我的问题在图片后面:
我有以下示例数据:
{
"name": "Bob",
"mi": "K",
"martialStatus": "M",
"age": 30,
"city": "Paris",
"job": "Engineer"
}
{
"name": "Chad",
"mi": "M",
"martialStatus": "W",
"age": 31,
"city": "Paris",
"job": "Doctor"
}
{
"name": "Mel",
"mi": "A",
"martialStatus": "D",
"age": 31,
"city": "London",
"job": "Doctor"
}
{
"name": "Frank",
"mi": "F",
"martialStatus": "S",
"age": 30,
"city": "London",
"job": "Engineer"
}
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我正在尝试编写一个 mongo 查询,该查询将以以下格式返回结果: "peopleCount": 4, "jobsList": { "job": "Doctor", "ageList": [ { "age": 31, "cityList ": [ { "city": "London", "people": [ { …
所以我在故事板中有一个带有不同按钮,标签和一些文本视图的应用程序,我直接在故事板中输入文本.我启用了基本本地化并添加了几种语言.
这为Base(英语)和其他语言生成了故事板,其中包含项目对象ID列表.我翻译了所有内容,标签和按钮(ALL OF THEM)工作并以我设置的语言显示.
然而,无论我设置哪种语言,文本字段都会显示初始英文文本...文本视图是否还有其他步骤?
我有以下代码块:
def response = '[{"id": "121","startTime": "2013-11-10T20:48:54Z", "reqId": 123456, "endTime": null, "numFiles" :null},
{"id": "123","startTime": "2013-11-29T21:45:00Z","reqId": 123458,"endTime": "2013-11-30T21:45:00Z", "numFiles" :null },
{"id": "121","startTime": "2013-11-8T20:48:54Z", "reqId": 123111, "endTime": null, "numFiles" :null}]'
def sortedResponse = response.sort { a,b -> b.reqId <=> a.reqId}
def reqRespAPI = new JsonSlurper().parseText(sortedResponse )
def id = reqRespAPI.id
def stTime = reqRespAPI.startTime
def eTime = reqRespAPI.endTime
def rqId = reqRespAPI.reqId
def numRec = reqRespAPI.numFiles
...some other stuff here....
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我正在尝试按 reqId (rqId) 降序排序。我必须使用 for 循环吗?当前 sortedResponse 抛出异常:
groovy.lang.MissingMethodException: No …
我正在尝试获取设备的航向信息,以便利用磁航向和真实航向之间的差异来确定用户位置的磁偏角。为此,我有一个 Helper 类和我的 MainVc (mvc)。在我的辅助类 init 方法中,我执行以下操作:
...
...
locationManager = CLLocationManager()
switch CLLocationManager.authorizationStatus() {
case .AuthorizedAlways:
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters
locationManager.startUpdatingLocation()
case .NotDetermined:
locationManager.requestAlwaysAuthorization()
case .AuthorizedWhenInUse, .Restricted, .Denied:
mvc.alertDenied();
}
if (!initialized)
{
initialized = true;
self.performSelector("finishUpdatingLocation", withObject: nil, afterDelay: 2.0);
}
}
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
print ("didUpdateLocations")
var userLocation:CLLocation = locations[0] as! CLLocation
longitude = Float(userLocation.coordinate.longitude);
latitude = Float(userLocation.coordinate.latitude);
}
func finishUpdatingLocation () {
locationManager.stopUpdatingLocation();
NSObject.cancelPreviousPerformRequestsWithTarget(self, selector: "finishUpdatingLocation", object: nil);
mvc.goingToUpdateHeading();
locationManager.startUpdatingHeading(); …
Run Code Online (Sandbox Code Playgroud) 我有以下代码:
MKMapRect mRect = self.mapView.visibleMapRect;
MKMapPoint eastMapPoint = MKMapPointMake(MKMapRectGetMaxX(mRect), MKMapRectGetMaxY(mRect)/2);
MKMapPoint northMapPoint = MKMapPointMake(MKMapRectGetMaxX(mRect)/2, 0);
MKMapPoint southMapPoint = MKMapPointMake(MKMapRectGetMaxX(mRect)/2, MKMapRectGetMaxY(mRect));
MKMapPoint westMapPoint = MKMapPointMake(0, MKMapRectGetMaxY(mRect)/2);
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我正在将这些转换为CLLocationCoordinate2D
with MKCoordinateForMapPoint
。例如:
CLLocationCoordinate2D northCoords = MKCoordinateForMapPoint(northMapPoint);
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与 一起northCoords
,我有centerCoords
which 是地图中心点的坐标。使用这两组坐标,我创建了一个数组,将这两组坐标CLLocationCoordinate2D coordinates[2]
添加到其中...
下面,我用下面的代码在两个坐标之间画一条线:
MKPolyline *polyLine = [MKPolyline polylineWithCoordinates:coordinates count:2];
[_mapView addOverlay:polyLine];
- (MKOverlayView *)mapView:(MKMapView *)mapView viewForOverlay:(id <MKOverlay>)overlay
{
MKPolylineView *polylineView = [[MKPolylineView alloc] initWithPolyline:overlay];
polylineView.strokeColor = [UIColor redColor];
polylineView.lineWidth = 5.0;
return polylineView;
}
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问题:
折线叠加起点(地图中心)始终从中心开始是正确的。然而,线路的另一端(北/南/东/西)没有正确指向它应该在的位置。在下图中,我正在绘制与上面的 4 MKMapPoint …