百度地图的路径规划功能，
在使用百度路径的时候，出现了一些小问题，在此，分享一下自己的最简单的一个路径小demo
当然，前面的百度配置问题，我就不和大家讲了，因为这方面的资料太多了！现在，我来介绍一下这个小demo
AppDelegate.m文件如下，
#import "AppDelegate.h"
@implementation AppDelegate
(BOOL)application:(UIApplication )application didFinishLaunchingWithOptions:(NSDictionary )launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.window.backgroundColor = [UIColor whiteColor];
mapManager = [[BMKMapManager alloc]init];
// 如果要关注网络及授权验证事件，请设定 generalDelegate参数
BOOL ret = [mapManager start:@“6Gp5e6XYGQn5aRRD1DK0vKCf” generalDelegate:nil];
if (!ret) {
NSLog(@"manager start failed!");
}
rootViewController *rootVC = [[rootViewController alloc] init];
navigationController = [[UINavigationController alloc] initWithRootViewController:rootVC];
self.window.rootViewController = navigationController;
[self.window makeKeyAndVisible];
return YES;
}
然后，rootViewController.m文件如下，这里只有步行这个按钮有效果哦！
#import "rootViewController.h"
@interface RouteAnnotation : BMKPointAnnotation
{
int _type; ///<0:起点 1：终点 2：公交 3：地铁 4:驾乘 5:途经点 int _degree;
}
@property (nonatomic) int type;
@property (nonatomic) int degree;
@end
@implementation RouteAnnotation
@synthesize type = type;
@synthesize degree = degree;
@end
@interface rootViewController ()
{
UITextField *textFrom; UITextField *textTo; UIButton *btnBus; UIButton *btnCar; UIButton *btnfoot; UIView *_mapV ; BMKMapView* _mapView; BMKRouteSearch* _routesearch;
}
@implementation UIImage(InternalMethod)
(UIImage*)imageRotatedByDegrees:(CGFloat)degrees
{
CGFloat width = CGImageGetWidth(self.CGImage);
CGFloat height = CGImageGetHeight(self.CGImage);
CGSize rotatedSize;
rotatedSize.width = width;
rotatedSize.height = height;
UIGraphicsBeginImageContext(rotatedSize);
CGContextRef bitmap = UIGraphicsGetCurrentContext();
CGContextTranslateCTM(bitmap, rotatedSize.width/2, rotatedSize.height/2);
CGContextRotateCTM(bitmap, degrees * M_PI / 180);
CGContextRotateCTM(bitmap, M_PI);
CGContextScaleCTM(bitmap, -1.0, 1.0);
CGContextDrawImage(bitmap, CGRectMake(-rotatedSize.width/2, -rotatedSize.height/2, rotatedSize.width, rotatedSize.height), self.CGImage);
UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return newImage;
}
@interface rootViewController ()
@implementation rootViewController
(NSString)getMyBundlePath1:(NSString )filename
{
NSBundle * libBundle = MYBUNDLE ;
if ( libBundle && filename ){
NSString * s=[[libBundle resourcePath ] stringByAppendingPathComponent : filename]; return s;
}
return nil ;
}
(id)initWithNibName:(NSString )nibNameOrNil bundle:(NSBundle )nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization self.view.backgroundColor = [UIColor redColor];
}
return self;
}
(void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
self.title = @“路径规划”;
[self setUpUI];
textFrom.text = @“天安门”;
textTo.text = @“百度大厦”;
routesearch = [[BMKRouteSearch alloc]init];
routesearch.delegate = self;// 此处记得不用的时候需要置nil，否则影响内存的释放
mapView = [[BMKMapView alloc]initWithFrame:mapV.bounds];
mapView.delegate = self; // 此处记得不用的时候需要置nil，否则影响内存的释放
[mapV addSubview:_mapView];
}
-(void)setUpUI
{
UILabel *lableFrom = [[UILabel alloc] initWithFrame:CGRectMake(20,70, 60, 30)]; lableFrom.text = @"起点"; UILabel *lableTo = [[UILabel alloc] initWithFrame:CGRectMake(20,120, 60, 30)]; lableTo.text = @"终点"; textFrom = [[UITextField alloc] initWithFrame:CGRectMake(100, 70, 80, 30)]; textFrom.backgroundColor = [UIColor greenColor]; textTo = [[UITextField alloc] initWithFrame:CGRectMake(100, 120, 80, 30)]; textTo.backgroundColor = [UIColor greenColor]; btnBus = [[UIButton alloc] initWithFrame:CGRectMake(20, 160, 40, 30)]; [btnBus setTitle:@"公交" forState:UIControlStateNormal]; btnCar = [[UIButton alloc] initWithFrame:CGRectMake(80, 160, 40, 30)]; [btnCar setTitle:@"驾车" forState:UIControlStateNormal]; btnfoot = [[UIButton alloc] initWithFrame:CGRectMake(150, 160, 40, 30)]; [btnfoot setTitle:@"步行" forState:UIControlStateNormal]; [btnfoot addTarget:self action:@selector(walkBtnClick) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview: lableFrom]; [self.view addSubview: lableTo]; [self.view addSubview: textFrom]; [self.view addSubview: textTo]; [self.view addSubview: btnBus]; [self.view addSubview: btnCar]; [self.view addSubview: btnfoot]; CGFloat height = [UIScreen mainScreen].bounds.size.height - CGRectGetMaxY(btnBus.frame) ; _mapV = [[UIView alloc] initWithFrame:CGRectMake(0, CGRectGetMaxY(btnBus.frame), 320, height)]; _mapV.backgroundColor = [UIColor whiteColor]; [self.view addSubview:_mapV];
}
-(void)walkBtnClick
{
BMKPlanNode* start = [[BMKPlanNode alloc]init] ;
start.name = textFrom.text;
start.cityName = @"北京市";
BMKPlanNode* end = [[BMKPlanNode alloc]init];
end.name = textTo.text;
end.cityName = @"北京市";
BMKWalkingRoutePlanOption *walkingRouteSearchOption = [[BMKWalkingRoutePlanOption alloc]init];
walkingRouteSearchOption.from = start;
walkingRouteSearchOption.to = end;
NSLog(@"%@------%@",start.name,end.name);
BOOL flag = [_routesearch walkingSearch:walkingRouteSearchOption];
if(flag)
{
NSLog(@"walk检索发送成功");
}
else
{
NSLog(@"walk检索发送失败");
}
}
BMKWalkingRouteLine* plan = (BMKWalkingRouteLine*)[result.routes objectAtIndex:0];
int size = [plan.steps count];
int planPointCounts = 0;
for (int i = 0; i < size; i++) {
BMKWalkingStep* transitStep = [plan.steps objectAtIndex:i];
if(i==0){
RouteAnnotation* item = [[RouteAnnotation alloc]init];
item.coordinate = plan.starting.location;
item.title = @"起点";
item.type = 0;
[_mapView addAnnotation:item]; // 添加起点标注
}else if(i==size-1){
RouteAnnotation* item = [[RouteAnnotation alloc]init];
item.coordinate = plan.terminal.location;
item.title = @"终点";
item.type = 1;
[_mapView addAnnotation:item]; // 添加起点标注
}
//添加annotation节点
RouteAnnotation* item = [[RouteAnnotation alloc]init];
item.coordinate = transitStep.entrace.location;
item.title = transitStep.entraceInstruction;
item.degree = transitStep.direction * 30;
item.type = 4;
[_mapView addAnnotation:item];
//轨迹点总数累计
planPointCounts += transitStep.pointsCount;
}
//轨迹点
BMKMapPoint * temppoints = new BMKMapPoint[planPointCounts];
int i = 0;
for (int j = 0; j < size; j++) {
BMKWalkingStep* transitStep = [plan.steps objectAtIndex:j];
int k=0;
for(k=0;k<transitStep.pointsCount;k++) {
temppoints[i].x = transitStep.points[k].x;
temppoints[i].y = transitStep.points[k].y;
i++;
}
}
// 通过points构建BMKPolyline
BMKPolyline* polyLine = [BMKPolyline polylineWithPoints:temppoints count:planPointCounts];
[_mapView addOverlay:polyLine]; // 添加路线overlay
delete []temppoints; }}
BMKPolylineView* polylineView = [[BMKPolylineView alloc] initWithOverlay:overlay]; polylineView.fillColor = [[UIColor cyanColor] colorWithAlphaComponent:1]; polylineView.strokeColor = [[UIColor blueColor] colorWithAlphaComponent:0.7]; polylineView.lineWidth = 3.0; return polylineView;}
(BMKAnnotationView)getRouteAnnotationView:(BMKMapView )mapview viewForAnnotation:(RouteAnnotation)routeAnnotation
{
BMKAnnotationView view = nil;
switch (routeAnnotation.type) {
case 0:
{
view = [mapview dequeueReusableAnnotationViewWithIdentifier:@"start_node"];
if (view == nil) {
view = [[BMKAnnotationView alloc]initWithAnnotation:routeAnnotation reuseIdentifier:@"start_node"] ;
view.image = [UIImage imageWithContentsOfFile:[self getMyBundlePath1:@"images/icon_nav_start.png"]];
view.centerOffset = CGPointMake(0, -(view.frame.size.height * 0.5));
view.canShowCallout = TRUE;
}
view.annotation = routeAnnotation;
}
break;
case 1:
{
view = [mapview dequeueReusableAnnotationViewWithIdentifier:@"end_node"];
if (view == nil) {
view = [[BMKAnnotationView alloc]initWithAnnotation:routeAnnotation reuseIdentifier:@"end_node"] ;
view.image = [UIImage imageWithContentsOfFile:[self getMyBundlePath1:@"images/icon_nav_end.png"]];
view.centerOffset = CGPointMake(0, -(view.frame.size.height * 0.5));
view.canShowCallout = TRUE;
}
view.annotation = routeAnnotation;
}
break;
case 2:
{
view = [mapview dequeueReusableAnnotationViewWithIdentifier:@"bus_node"];
if (view == nil) {
view = [[BMKAnnotationView alloc]initWithAnnotation:routeAnnotation reuseIdentifier:@"bus_node"] ;
view.image = [UIImage imageWithContentsOfFile:[self getMyBundlePath1:@"images/icon_nav_bus.png"]];
view.canShowCallout = TRUE;
}
view.annotation = routeAnnotation;
}
break;
case 3:
{
view = [mapview dequeueReusableAnnotationViewWithIdentifier:@"rail_node"];
if (view == nil) {
view = [[BMKAnnotationView alloc]initWithAnnotation:routeAnnotation reuseIdentifier:@"rail_node"] ;
view.image = [UIImage imageWithContentsOfFile:[self getMyBundlePath1:@"images/icon_nav_rail.png"]];
view.canShowCallout = TRUE;
}
view.annotation = routeAnnotation;
}
break;
case 4:
{
view = [mapview dequeueReusableAnnotationViewWithIdentifier:@"route_node"];
if (view == nil) {
view = [[BMKAnnotationView alloc]initWithAnnotation:routeAnnotation reuseIdentifier:@"route_node"] ;
view.canShowCallout = TRUE;
} else {
[view setNeedsDisplay];
}
UIImage* image = [UIImage imageWithContentsOfFile:[self getMyBundlePath1:@"images/icon_direction.png"]];
view.image = [image imageRotatedByDegrees:routeAnnotation.degree];
view.annotation = routeAnnotation;
}
break;
case 5:
{
view = [mapview dequeueReusableAnnotationViewWithIdentifier:@"waypoint_node"];
if (view == nil) {
view = [[BMKAnnotationView alloc]initWithAnnotation:routeAnnotation reuseIdentifier:@"waypoint_node"] ;
view.canShowCallout = TRUE;
} else {
[view setNeedsDisplay];
}
UIImage* image = [UIImage imageWithContentsOfFile:[self getMyBundlePath1:@"images/icon_nav_waypoint.png"]];
view.image = [image imageRotatedByDegrees:routeAnnotation.degree];
view.annotation = routeAnnotation;
}
break;
default:
break; }
return view;
}
(BMKAnnotationView )mapView:(BMKMapView )view viewForAnnotation:(id )annotation
{
if ([annotation isKindOfClass:[RouteAnnotation class]]) {
return [self getRouteAnnotationView:view viewForAnnotation:(RouteAnnotation*)annotation];
}
return nil;
}
(void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
而 _routesearch.delegate = self;在设置代理的时候，使用的是BMKRouteSearch百度api中的代理，而此代理必须先实现了代理方法才能设置代理（一般我们些的代理方法，并不需要先遵守哦！）而且我们使用的是arc，所以，这行代码会报错！必须把代理属性设置为weak才行哦！
其它基本上没有什么错误了哈，其它不会可以参考官方demo哦！
原文：http://my.oschina.net/panyong/blog/306558