MapKit

 

加入MapKit library

首先得在项目中加入MapKit，如图

 

MapView

先增长一个ViewController，我这里用的storyboard，这个玩意仍是挺好用的，比之前用xib好多了。

而后拖一个mapview上去，如：

给新增长的ViewController绑定一个class。首先得增长一个class，从uiViewController继承下来。这个很简单，如图

把新增长的ViewController绑定到这个class，也很easy，发现Xcode仍是挺牛的。就是在右边Identity inspector里面的custom class里面改为新增长的类，原来是UIViewController。

而后给map view控件绑定一个变量，类型是MKMapView

而后就初始化mapview，显示。代码以下：

 

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.

    _mapView.mapType = MKMapTypeStandard;//标准模式
    _mapView.showsUserLocation = YES;//显示本身

    _mapView.zoomEnabled = YES;//支持缩放


    CLLocationCoordinate2D pos = {39.931203, 116.395573};//找个坐标，我是用百度坐标抓取弄的。http://api.map.baidu.com/lbsapi/getpoint/

    MKCoordinateRegion viewRegion = MKCoordinateRegionMakeWithDistance(pos,2000, 2000);//以pos为中心，显示2000米
    MKCoordinateRegion adjustedRegion = [_mapView regionThatFits:viewRegion];//适配map view的尺寸
    [_mapView setRegion:adjustedRegion animated:YES];


}

我这里使用百度坐标，找了个坐标（直接搜索“百度 坐标”），而后在咱们本身的地图里显示。这样运行一下就能够看到：

 

Map view delegate 回调

能够实现协议MKMapViewDelegate, 这样就会有几个回调。

 

- (void) mapViewWillStartLoadingMap:(MKMapView *)mapView//开始从服务器获取地图数据
{

}

-(void)mapViewDidFinishLoadingMap:(MKMapView *)mapView//获取数据结束
{

}

- (void) mapViewDidFailLoadingMap:(MKMapView *)mapView withError:(NSError *)error//获取数据失败了。
{

}

获取设备当前位置而且在地图中显示

 

 

增长一个按钮，点击这个按钮，将显示设备当前位置。点击上面的按钮将显示某个固定位置。

CLLocationManager,首先使用CLLocationManager来获取设备的当前位置。

代码也是很简单

 

//得到本身的当前的位置信息
- (void) getCurPosition
{
    //开始探测本身的位置
    if (locationManager==nil)
    {
        locationManager =[[CLLocationManager alloc] init];
    }


    if ([CLLocationManager locationServicesEnabled])
    {
        locationManager.delegate=self;
        locationManager.desiredAccuracy=kCLLocationAccuracyBest;
        locationManager.distanceFilter=10.0f;
        [locationManager startUpdatingLocation];
    }
}

而后实现回调函数

 

 

#pragma mark -- CLLocationManagerDelegate
- (void) locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
{
    if ([locations count] > 0) {
        CLLocation* loc = [locations objectAtIndex:0];
        CLLocationCoordinate2D pos = [loc coordinate];

        NSLog(@"locationManager, longitude: %f, latitude: %f", pos.longitude, pos.latitude);

        if (show == NO) {
            MKCoordinateRegion viewRegion = MKCoordinateRegionMakeWithDistance(pos,2000, 2000);//以pos为中心，显示2000米
            MKCoordinateRegion adjustedRegion = [_mapView regionThatFits:viewRegion];//适配map view的尺寸
            [_mapView setRegion:adjustedRegion animated:YES];

            show = YES;
        }
    }
}

当设备位置变化时，这个函数会被调用。这样咱们就能够根据位置来作一些事情了。这个例子里就在第一次获取位置的时候更新一下地图显示。以设备当前位置为中心，显示2000米。

 

 

完了。贴一下mapview所在的controller代码：

 

//
//  KMapViewController.m
//  MapDemo
//
//  Created by Kevin on 14-2-10.
//  Copyright (c) 2014年 Kevin. All rights reserved.
//

#import "KMapViewController.h"

@interface KMapViewController ()

@end

@implementation KMapViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.

    show = NO;

    _mapView.mapType = MKMapTypeStandard;//标准模式
    _mapView.showsUserLocation = YES;//显示本身
    _mapView.delegate = self;
    _mapView.zoomEnabled = YES;//支持缩放


    NSString* i = self.Index;

    if([i isEqualToString:@"1"])
    {
        CLLocationCoordinate2D pos = {39.931203, 116.395573};//找个坐标，我是用百度坐标抓取弄的。http://api.map.baidu.com/lbsapi/getpoint/

        MKCoordinateRegion viewRegion = MKCoordinateRegionMakeWithDistance(pos,2000, 2000);//以pos为中心，显示2000米
        MKCoordinateRegion adjustedRegion = [_mapView regionThatFits:viewRegion];//适配map view的尺寸
        [_mapView setRegion:adjustedRegion animated:YES];

    }
    else
    {
        [self getCurPosition];
    }

}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

- (void) dealloc
{

 //   [super dealloc];
}

//得到本身的当前的位置信息
- (void) getCurPosition
{
    //开始探测本身的位置
    if (locationManager==nil)
    {
        locationManager =[[CLLocationManager alloc] init];
    }


    if ([CLLocationManager locationServicesEnabled])
    {
        locationManager.delegate=self;
        locationManager.desiredAccuracy=kCLLocationAccuracyBest;
        locationManager.distanceFilter=10.0f;
        [locationManager startUpdatingLocation];
    }
}

#pragma mark -- MPMapViewDelegate

- (void) mapViewWillStartLoadingMap:(MKMapView *)mapView
{

}

-(void)mapViewDidFinishLoadingMap:(MKMapView *)mapView
{

}

- (void) mapViewDidFailLoadingMap:(MKMapView *)mapView withError:(NSError *)error
{

}

#pragma mark -- CLLocationManagerDelegate
- (void) locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
{
    if ([locations count] > 0) {
        CLLocation* loc = [locations objectAtIndex:0];
        CLLocationCoordinate2D pos = [loc coordinate];

        NSLog(@"locationManager, longitude: %f, latitude: %f", pos.longitude, pos.latitude);

        if (show == NO) {
            MKCoordinateRegion viewRegion = MKCoordinateRegionMakeWithDistance(pos,2000, 2000);//以pos为中心，显示2000米
            MKCoordinateRegion adjustedRegion = [_mapView regionThatFits:viewRegion];//适配map view的尺寸
            [_mapView setRegion:adjustedRegion animated:YES];

            show = YES;
        }
    }
}

@end