问题描述
目标 c 的新手,我在地图部分使用 ArcGIS.我遇到了没有调用/加载方法 mapViewDidLoad
的问题.这是代码的一部分:
New to objective c, and I am using ArcGIS for the map portion. I have a problem where the method mapViewDidLoad
is not called/loaded. Here is some part of the code:
.h 文件
@interface ViewController : UIViewController<AGSMapViewLayerDelegate, AGSMapViewTouchDelegate, AGSMapViewCalloutDelegate>{
AGSMapView *_mapView;
AppDelegate *appDelegate;
...
}
.m 文件
- (void)viewDidLoad
{
[super viewDidLoad];
[self.activityView startAnimating];
self.mapView.touchDelegate = self;
self.mapView.calloutDelegate = self;
appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
CLLocationManager *locationManager = [[CLLocationManager alloc] init];
...
}
- (void)mapViewDidLoad:(AGSMapView *)mapView {
AGSEnvelope *envelope = [[AGSEnvelope alloc]initWithXmin:29757.610204117
ymin:40055.0379682464
xmax:29884.6992302249
ymax:40236.6028660071
spatialReference:self.mapView.spatialReference];
[self.mapView zoomToEnvelope:envelope animated:YES];
self.mapView.callout.width = 195.0f;
self.mapView.callout.accessoryButtonHidden = YES;
[self.mapView.gps start];
[self.mapView centerAtPoint:self.mapView.gps.currentPoint animated:YES];
NSLog(@"Location : %@", self.mapView.gps.currentPoint);
[self.activityView stopAnimating];
self.activityView.hidden = YES;
}
我的代码有什么问题,为什么我没有加载 mapViewDidLoad
方法.提前致谢.
What is wrong with my code why i doesn't load the mapViewDidLoad
method.Thanks in advance.
推荐答案
确保 mapviewdelegate 通过右键单击 mapview 然后分配委托来连接.
make sure that mapviewdelegate is connected by right click on mapview and then assign delegate..
或添加[self.mapview setDelegate:self];
在您的情况下,AGSMapView" mapViewDidLoad:在将第一层添加到地图后调用 AGSMapViewLayerDelegate 上的方法.此时,该组件功能齐全,您可以在http://help.arcgis.com/en/arcgismobile/10.0/apis/iphone/reference/interface_a_g_s_map_view.html
in your case "AGSMapView" mapViewDidLoad: method on AGSMapViewLayerDelegate is invoked after the first layer has been added to the map. At this point, the component is fully functional you can find reference to it inhttp://help.arcgis.com/en/arcgismobile/10.0/apis/iphone/reference/interface_a_g_s_map_view.html
make self.mapview.layerDelegate = self;
make self.mapview.layerDelegate = self;
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