MapKit

 

加入MapKit library

首先得在項目中加入MapKit，如圖

 

MapView

先增長一個ViewController，我這裏用的storyboard，這個玩意仍是挺好用的，比之前用xib好多了。

而後拖一個mapview上去，如：

給新增長的ViewController綁定一個class。首先得增長一個class，從uiViewController繼承下來。這個很簡單，如圖

把新增長的ViewController綁定到這個class，也很easy，發現Xcode仍是挺牛的。就是在右邊Identity inspector裏面的custom class裏面改爲新增長的類，原來是UIViewController。

而後給map view控件綁定一個變量，類型是MKMapView

而後就初始化mapview，顯示。代碼以下：

 

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

    _mapView.mapType = MKMapTypeStandard;//標準模式
    _mapView.showsUserLocation = YES;//顯示本身

    _mapView.zoomEnabled = YES;//支持縮放


    CLLocationCoordinate2D pos = {39.931203, 116.395573};//找個座標，我是用百度座標抓取弄的。http://api.map.baidu.com/lbsapi/getpoint/

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


}

我這裏使用百度座標，找了個座標（直接搜索「百度 座標」），而後在咱們本身的地圖裏顯示。這樣運行一下就能夠看到：

 

Map view delegate 回調

能夠實現協議MKMapViewDelegate, 這樣就會有幾個回調。

 

- (void) mapViewWillStartLoadingMap:(MKMapView *)mapView//開始從服務器獲取地圖數據
{

}

-(void)mapViewDidFinishLoadingMap:(MKMapView *)mapView//獲取數據結束
{

}

- (void) mapViewDidFailLoadingMap:(MKMapView *)mapView withError:(NSError *)error//獲取數據失敗了。
{

}

獲取設備當前位置而且在地圖中顯示

 

 

增長一個按鈕，點擊這個按鈕，將顯示設備當前位置。點擊上面的按鈕將顯示某個固定位置。

CLLocationManager,首先使用CLLocationManager來獲取設備的當前位置。

代碼也是很簡單

 

//得到本身的當前的位置信息
- (void) getCurPosition
{
    //開始探測本身的位置
    if (locationManager==nil)
    {
        locationManager =[[CLLocationManager alloc] init];
    }


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

而後實現回調函數

 

 

#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爲中心，顯示2000米
            MKCoordinateRegion adjustedRegion = [_mapView regionThatFits:viewRegion];//適配map view的尺寸
            [_mapView setRegion:adjustedRegion animated:YES];

            show = YES;
        }
    }
}

當設備位置變化時，這個函數會被調用。這樣咱們就能夠根據位置來作一些事情了。這個例子裏就在第一次獲取位置的時候更新一下地圖顯示。以設備當前位置爲中心，顯示2000米。

 

 

完了。貼一下mapview所在的controller代碼：

 

//
//  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;//標準模式
    _mapView.showsUserLocation = YES;//顯示本身
    _mapView.delegate = self;
    _mapView.zoomEnabled = YES;//支持縮放


    NSString* i = self.Index;

    if([i isEqualToString:@"1"])
    {
        CLLocationCoordinate2D pos = {39.931203, 116.395573};//找個座標，我是用百度座標抓取弄的。http://api.map.baidu.com/lbsapi/getpoint/

        MKCoordinateRegion viewRegion = MKCoordinateRegionMakeWithDistance(pos,2000, 2000);//以pos爲中心，顯示2000米
        MKCoordinateRegion adjustedRegion = [_mapView regionThatFits:viewRegion];//適配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];
}

//得到本身的當前的位置信息
- (void) getCurPosition
{
    //開始探測本身的位置
    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爲中心，顯示2000米
            MKCoordinateRegion adjustedRegion = [_mapView regionThatFits:viewRegion];//適配map view的尺寸
            [_mapView setRegion:adjustedRegion animated:YES];

            show = YES;
        }
    }
}

@end