如何使用mapKit點之間畫線在Xcode 6

Question

我新的iOS開發，我使用的XCode 6.

我想在地圖上的兩個位置之間畫一條路線，就像一個導遊。當遊客點擊另一個地點時，我希望能夠繪製路線;並告知距離當前位置的距離。

Answer 1

據我所知你的問題是你想繪製兩個地點之間的路線。 要實現此操作，請先製作兩個UITexfield以獲取源和目標，然後使用一個UIButton執行操作。 連接所有網點

不要Forger添加Map Framework。

ViewController.h

#import <UIKit/UIKit.h> 
#import <MapKit/MapKit.h> 
#import <CoreLocation/CoreLocation.h> 


@interface ViewController : UIViewController<MKMapViewDelegate> 
{ 

IBOutlet UITextField *source1; 
IBOutlet UITextField *destination1; 
IBOutlet MKMapView *map; 
MKAnnotationView *Annotation; 

} 
-(CLLocationCoordinate2D)FindCoordinates:(NSString *)place; 
- (MKOverlayView *)mapView:(MKMapView *)mapView viewForOverlay:(id)overlay; 
-(IBAction)getLocation:(id)sender; 

@end 

ViewController.m

#import "ViewController.h" 


@interface ViewController() 

{ 
    CLLocationCoordinate2D myLocation; 
    CLLocationCoordinate2D sourceLocation; 
    CLLocationCoordinate2D destinationLocation; 
} 
@end 

@implementation ViewController 

- (void)viewDidLoad { 
[super viewDidLoad]; 

} 


-(CLLocationCoordinate2D)FindCoordinates:(NSString *)place 
{ 

NSString *addresss = place; 
NSString *esc_addr = [addresss stringByAddingPercentEscapesUsingEncoding: NSUTF8StringEncoding]; 
NSString *req = [NSString stringWithFormat: @"http://maps.google.com/maps/api/geocode/json?sensor=false&address=%@", esc_addr]; 

NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:req]]; 


NSDictionary *googleResponse = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil]; 

NSDictionary *resultsDict = [googleResponse valueForKey: @"results"]; // get the results dictionary 
NSDictionary *geometryDict = [ resultsDict valueForKey: @"geometry"]; // geometry dictionary within the results dictionary 
NSDictionary *locationDict = [ geometryDict valueForKey: @"location"]; // location dictionary within the geometry dictionary 

// nslo (@」– returning latitude & longitude from google –」); 

NSArray *latArray = [locationDict valueForKey: @"lat"]; NSString *latString = [latArray lastObject];  // (one element) array entries provided by the json parser 
NSArray *lngArray = [locationDict valueForKey: @"lng"]; NSString *lngString = [lngArray lastObject];  // (one element) array entries provided by the json parser 

myLocation.latitude = [latString doubleValue];  // the json parser uses NSArrays which don’t support 「doubleValue」 
myLocation.longitude = [lngString doubleValue]; 

return myLocation; 

} 

-(IBAction)getLocation:(id)sender 
{ 
sourceLocation = [self FindCoordinates:source1.text]; 
NSLog(@"%@",[NSString stringWithFormat:@"Source lat:%f Source lon:%f",sourceLocation.latitude,sourceLocation.longitude]); 
destinationLocation = [self FindCoordinates:destination1.text]; 
NSLog(@"%@",[NSString stringWithFormat:@"Desti lat:%f Desti lon:%f",destinationLocation.latitude,destinationLocation.longitude]); 

CLLocation *loc1 = [[CLLocation alloc] initWithLatitude:sourceLocation.latitude longitude:sourceLocation.longitude]; 
CLLocation *loc2 = [[CLLocation alloc] initWithLatitude:destinationLocation.latitude longitude:destinationLocation.longitude]; 
CLLocationDistance distance = [loc1 distanceFromLocation:loc2]; 
NSLog(@"%@",[NSString stringWithFormat:@"Distance iin KMeteres %f",distance/1000]); // Gives me air distance 


} 


@end