IOS开发中绘制地图线路

地图应用经常会涉及到线路的绘制问题，ios下可以使用MKMapView进行地图开发，使用

MKOverlayView进行线路的绘制。

使用MKMapView添加MKMap.framework 和CoreLocation.framework并导入

MapKit.h头文件。

新建一个基于视图的工程，修改头文件：

 

1 #import <UIKit/UIKit.h>  
2 #import <MapKit/MapKit.h>  
3 #import "CloMKAnnotation.h"  
4 @interface CloViewController : UIViewController<CLLocationManagerDelegate, MKMapViewDelegate, UIActionSheetDelegate>{  
5     MKMapView *cloMapView;  
6     MKPolyline *routeLine;  
7 }  
8   
9 @property (nonatomic, strong)  NSMutableArray *locations;

修改实现代码，在.m中添加如下代码：

  1 #import "CloViewController.h"  
  2   
  3 @interface CloViewController ()  
  4   
  5 @end  
  6   
  7 @implementation CloViewController  
  8 @synthesize locations;  
  9   
 10 - (void)viewDidLoad  
 11 {  
 12     [super viewDidLoad];  
 13     // Do any additional setup after loading the view, typically from a nib.  
 14     cloMapView = [[MKMapView alloc] initWithFrame:[self.view bounds]];  
 15     [cloMapView setMapType:MKMapTypeHybrid];  //设置地图类型 地图/卫星/两者结合  
 16     [cloMapView setShowsUserLocation:YES];      //显示当前位置  
 17     [cloMapView setDelegate:self];  
 18       
 19     CLLocationManager *locationManager = [[CLLocationManager alloc] init];  
 20     //设置CLLocationManager实例委托和精度  
 21     [locationManager setDelegate:self];  
 22     [locationManager setDesiredAccuracy:kCLLocationAccuracyBest];  
 23     //设置距离筛选器，表示至少移动100米才通知委托更新  
 24     [locationManager setDistanceFilter:100.f];  
 25     //启动更新请求  
 26 //    [locationManager startUpdatingLocation];  
 27       
 28     locations = [[NSMutableArray alloc] init];  
 29     float latitude = 39.8127;    //维度  
 30     float longitude = 116.2967;  //经度  
 31     for (int i = 0; i < 10; i++) {  
 32           
 33         [locations addObject:[NSString stringWithFormat:@"%f,%f", latitude + 0.01*i, longitude + 0.01*i]];  
 34 //            NSLog(@"locations:%i",locations.count);  
 35     }  
 36       
 37     //地图初始  
 38     CLLocationCoordinate2D coords;  
 39     coords.latitude = 39.9127;  
 40     coords.longitude = 116.3967;  
 41     float zoomlevel = 0.22;  
 42     MKCoordinateRegion region = MKCoordinateRegionMake(coords, MKCoordinateSpanMake(zoomlevel, zoomlevel));  
 43     [cloMapView setRegion:[cloMapView regionThatFits:region] animated:YES];  
 44       
 45     [cloMapView addOverlay:[self makePolylineWithLocations:locations]];  
 46     [self.view addSubview:cloMapView];  
 47       
 48 }  
 49   
 50 - (void)viewDidUnload  
 51 {  
 52     [super viewDidUnload];  
 53     // Release any retained subviews of the main view.  
 54     cloMapView = nil;  
 55 }  
 56   
 57 - (void)dealloc{  
 58     [cloMapView release];  
 59     [super dealloc];  
 60 }  
 61   
 62 - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation  
 63 {  
 64     return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);  
 65 }  
 66   
 67   
 68 //显示菜单选项  
 69 - (void)showActionSheet :(id)sender{  
 70     UIActionSheet * actionSheet = [[UIActionSheet alloc] initWithTitle:nil   
 71                                                               delegate:self   
 72                                                      cancelButtonTitle:@"取消"  
 73                                                 destructiveButtonTitle:@"添加足迹"  
 74                                                      otherButtonTitles:@"分享",@"详细",@"删除", nil];  
 75     [actionSheet setDelegate:self];  
 76     [actionSheet showInView:self.view];  
 77     [actionSheet release];  
 78 }  
 79   
 80 //根据坐标点生成线路  
 81 - (MKPolyline *)makePolylineWithLocations:(NSMutableArray *)newLocations{  
 82     MKMapPoint *pointArray = malloc(sizeof(CLLocationCoordinate2D)* newLocations.count);  
 83     for(int i = 0; i < newLocations.count; i++)    
 84     {    
 85         // break the string down even further to latitude and longitude fields.     
 86         NSString* currentPointString = [newLocations objectAtIndex:i];    
 87         NSArray* latLonArr = [currentPointString componentsSeparatedByCharactersInSet:[NSCharacterSet characterSetWithCharactersInString:@","]];  
 88         CLLocationDegrees latitude  = [[latLonArr objectAtIndex:0] doubleValue];    
 89         //        NSLog(@"latitude-> %f", latitude);  
 90         CLLocationDegrees longitude = [[latLonArr objectAtIndex:1] doubleValue];    
 91         CLLocationCoordinate2D coordinate = CLLocationCoordinate2DMake(latitude, longitude);    
 92         //        NSLog(@"point-> %f", point.x);  
 93           
 94         if (i == 0 || i == locations.count - 1) {//这里只添加起点和终点作为测试  
 95             CloMKAnnotation *ann = [[CloMKAnnotation alloc] init];  
 96             [ann setCoordinate:coordinate];  
 97             [ann setTitle:[NSString stringWithFormat:@"纬度:%f", latitude]];  
 98             [ann setSubtitle:[NSString stringWithFormat:@"经度:%f", longitude]];  
 99             [cloMapView addAnnotation:ann];  
100         }  
101         pointArray[i] = MKMapPointForCoordinate(coordinate);  
102     }    
103       
104     routeLine = [MKPolyline polylineWithPoints:pointArray count:newLocations.count];  
105     free(pointArray);  
106     return routeLine;  
107 }  
108 #pragma mark-  
109 #pragma CLLocationManager delegate method  
110 //位置变化后会调用  
111 - (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation{  
112     //可在此处更新用户位置信息  
113 //    cloMapView.userLocation  
114     NSLog(@"oldLocation:%@", [oldLocation description]);  
115     NSLog(@"newLocation:%@", [newLocation description]);  
116     NSLog(@"distance:%@", [newLocation distanceFromLocation:oldLocation]);  
117     //位置变化添加新位置点  
118     [locations addObject:[NSString stringWithFormat:@"%f,%f", newLocation.coordinate.latitude, newLocation.coordinate.longitude]];  
119     //删除进线路，更新新轨迹  
120     [cloMapView removeOverlay:routeLine];  
121     [cloMapView addOverlay:[self makePolylineWithLocations:locations]];  
122   
123 }  
124   
125 #pragma MKMapView delegate method  
126 //添加坐标点大头针  
127 - (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id<MKAnnotation>)annotation{  
128     if (![annotation isKindOfClass:[CloMKAnnotation class]]) {  
129         return nil;  
130     }  
131     static NSString *identifier = @"Annotation";  
132     MKPinAnnotationView *pinAnnotationView = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:identifier];  
133     if (pinAnnotationView == nil) {  
134         pinAnnotationView = [[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:identifier] autorelease];  
135     }  
136     pinAnnotationView.animatesDrop = YES;  
137     pinAnnotationView.canShowCallout = YES;  
138     pinAnnotationView.draggable = YES;  
139     UIButton *detailBtn = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];  
140     [detailBtn addTarget:self action:@selector(showActionSheet:) forControlEvents:UIControlEventTouchUpInside];  
141     pinAnnotationView.rightCalloutAccessoryView = detailBtn;  
142       
143     return pinAnnotationView;  
144 }  
145   
146 - (void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)view didChangeDragState:(MKAnnotationViewDragState)newState fromOldState:(MKAnnotationViewDragState)oldState{  
147       
148 }  
149   
150 //画线  
151 - (MKOverlayView *)mapView:(MKMapView *)mapView viewForOverlay:(id<MKOverlay>)overlay{  
152     NSLog(@"return overLayView...");  
153     if ([overlay isKindOfClass:[MKPolyline class]]) {  
154         MKPolylineView *routeLineView = [[[MKPolylineView alloc] initWithPolyline:routeLine] autorelease];  
155         routeLineView.strokeColor = [UIColor blueColor];  
156         routeLineView.lineWidth = 3;  
157         return routeLineView;  
158     }  
159     return nil;  
160 }  
161   
162 @end

这里主要是为了测试，初始时 locations坐标点自定义的，实际中是根据用户的位置动态生成的一系列坐标点。具体可在下面方法中实现

1 - (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation

另外用户的实时位置可用

1 cloMapView.userLocation = newLocation进行设置，然后显示在地图上。

运行效果

posted @ 2014-05-09 11:31  TianXiang.Liu  阅读(599)  评论(0)  编辑  收藏  举报