虽然我的最终项目不是另一个我停放app的地方。我认为这是一个很好地掌握MKMap
和Locations
的好地方。
好的,我可以设置别针,看看自己,让我当前的位置显示在标签上。
我不能做的是:
一个。按下按钮
1)存储用户当前位置。
2)在当前用户位置放下一个引脚(红色)。
(因此,即使用户(蓝色)移动,新引脚也会停留)
B中。单独按下按钮 1)清除用户掉针(红色)的地图。
我似乎无法为按钮中的新引脚设置地图注释。数字改变了,地图没有刷新(我猜是)用它来显示我的引脚或没有正确的一组坐标。
这是我到目前为止所做的。 (没有消息):P
#import "Find_My_CarViewController.h"
#import "MapAnnotation.h"
@implementation Find_My_CarViewController
@synthesize CLController;
@synthesize hereIamLat;
@synthesize hereIamLong;
@synthesize mapView;
- (void)dealloc
{
[hereIamLat release];
[hereIamLong release];
[CLController release];
[super dealloc];
}
- (void)didReceiveMemoryWarning
{
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, images, etc that aren't in use.
}
#pragma mark - View lifecycle
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad
{
[super viewDidLoad];
CLController = [[CoreLocationController alloc] init];
CLController.delegate = self;
[CLController.locMgr startUpdatingLocation];
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
// Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
-(void)viewWillAppear:(BOOL)animated
{
MKCoordinateRegion region;
region.center.latitude =40.798356;
region.center.longitude= -81.411158;
region.span.longitudeDelta=0.3;
region.span.latitudeDelta =0.3;
[mapView setRegion:region animated:YES];
}
- (void)locationUpdate:(CLLocation *)location
{
latitudeLabel.text = [NSString stringWithFormat:@"LATITUDE: %f", location.coordinate.latitude];
longitudeLabel.text = [NSString stringWithFormat:@"LONGITUDE: %f", location.coordinate.longitude];
//hereIamLat = [NSString stringWithFormat:@"%g", location.coordinate.latitude];
//hereIamLong = [NSString stringWithFormat:@"%g", location.coordinate.longitude];
}
- (void)locationError:(NSError *)error
{
//speedLabel.text = [error description];
}
-(IBAction)PushToMark
{
NSScanner *strLat = [NSScanner scannerWithString:latitudeLabel.text];
double dblLat;
[strLat scanDouble:&dblLat];
NSScanner *strLong = [NSScanner scannerWithString:longitudeLabel.text];
double dblLong;
[strLong scanDouble:&dblLong];
NSLog(@"lat: %f",dblLat);
NSLog(@"long: %f",dblLong);
MKCoordinateRegion location1;
location1.center.latitude =dblLat;
location1.center.longitude= dblLong;
location1.span.longitudeDelta=0.1;
location1.span.latitudeDelta =0.1;
MapAnnotation *ann1 =[[[MapAnnotation alloc] init] autorelease];
ann1.title=@"Here";
ann1.subtitle=@"I AM";
ann1.coordinate= location1.center;
[mapView addAnnotation:ann1];
}
@end
编辑: 好的,所以我走了这条路谢谢。
#import "LocationTestViewController.h"
#import "CoreLocation/CoreLocation.h"
#import "MapAnnotation.h"
@implementation LocationTestViewController
@synthesize locationManager;
@synthesize mapView;
- (void)dealloc
{
[mapView release];
[locationManager release];
[super dealloc];
}
- (void)didReceiveMemoryWarning
{
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, images, etc that aren't in use.
}
#pragma mark - View lifecycle
/*
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad
{
[super viewDidLoad];
}
*/
- (void)viewDidUnload
{
[self setMapView:nil];
[self setLocationManager:nil];
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
// Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
- (IBAction)getLocation:(id)sender {
locationManager = [[CLLocationManager alloc] init];
locationManager.distanceFilter=kCLDistanceFilterNone;
locationManager.desiredAccuracy = kCLLocationAccuracyHundredMeters;
[locationManager startUpdatingLocation];
[mapView setMapType:MKMapTypeStandard];
[mapView setZoomEnabled:YES];
[mapView setScrollEnabled:YES];
MKCoordinateRegion region = {{0.0,0.0},{0.0,0.0}};
region.center.latitude = locationManager.location.coordinate.latitude;
region.center.longitude = locationManager.location.coordinate.longitude;
region.span.longitudeDelta = 0.005f;
region.span.latitudeDelta = 0.005f;
[mapView setRegion:region animated:YES];
[mapView setDelegate:sender];
MKCoordinateRegion location1;
location1.center.latitude =locationManager.location.coordinate.latitude;
location1.center.longitude= locationManager.location.coordinate.longitude;
location1.span.longitudeDelta=0.1;
location1.span.latitudeDelta =0.1;
MapAnnotation *ann1 =[[[MapAnnotation alloc] init] autorelease];
ann1.title=@"You Parked Here";
ann1.subtitle=@"";
ann1.coordinate= location1.center;
[mapView addAnnotation:ann1];
}
@end
答案 0 :(得分:0)
在视图控制器的@property
中存储对创建的注释的引用。要删除,请使用
[mapView removeAnnotation:self.ann1];
self.ann1 = nil;
此外,您扫描标签中的字符串以找出坐标的策略也很奇怪。为什么不使用位置,您也可以将其存储在变量中?
答案 1 :(得分:0)
为什么在获得委托回调CLLocationCoordinate2D
时,不能使用- (void)locationUpdate:(CLLocation *)location
存储当前位置?没有理由使用MKCoordinateRegion
和NSScanner
。
请改为:
- (void)locationUpdate:(CLLocation *)location
{
latitudeLabel.text = [NSString stringWithFormat:@"LATITUDE: %f", location.coordinate.latitude];
longitudeLabel.text = [NSString stringWithFormat:@"LONGITUDE: %f", location.coordinate.longitude];
self.myLocation = location; // a property that stores the current location
}
然后在- (IBAction)pushToMark
中,您可以使用self.myLocation
作为坐标属性创建和添加注释。
至于删除注释 - 请参阅Mundi的答案。