四、衛星定位《蘋果iOS執行個體編程入門教程》

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該app為應用的功能為用iPhone 顯示你現在的位置

現版本 SDK 8.4 Xcode

運行Xcode 選擇 Create a new Xcode project ->Single View Application 命名 WhereAmI

(1) 點擊檔案夾WhereAmI -> General->Linked Frameworks and Libraries -> "+"->  搜尋 CoreLocation.framework ->add

 

 

(2)  開啟 ViewController.h 檔案,加入下面代碼

 

#import <UIKit/UIKit.h>

 

#import <CoreLocation/CoreLocation.h>

 

#import <CoreLocation/CLLocationManagerDelegate.h>

 

 

@interface ViewController : UIViewController <CLLocationManagerDelegate>{

    

    IBOutlet UITextField *altitude;

    

    IBOutlet UITextField *latitude;

    

    IBOutlet UITextField *longitude;

    

    CLLocationManager *locmanager;

    

    BOOL wasFound;

}

 

-(IBAction)update:(id)sender;

 

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

-(void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *) error;

 

@end

(3)  開啟 ViewController.m 檔案,加入下面代碼

 

#import "ViewController.h"

 

@interface ViewController ()

 

@end

 

@implementation ViewController

 

-(IBAction)update:(id)sender{

    

    locmanager = [[CLLocationManager alloc]init];

    

    [locmanager setDelegate:self];

    

    [locmanager setDesiredAccuracy:kCLLocationAccuracyBest];

    

    

    locmanager.distanceFilter=10;

    

    NSString *iOSVersion=[UIDevice currentDevice].systemVersion;

    

    //NSLog(@"%@",iOSVersion);

    

    if ((int)iOSVersion >= 8) {

        [locmanager requestWhenInUseAuthorization];//使用程式其間允許訪問位置資料（iOS8定位需要）

    }

    

    [locmanager startUpdatingLocation];

    

}

 

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

    

    if(wasFound)return;

    

    wasFound = YES;

    

    CLLocationCoordinate2D loc = [newLocation coordinate];

    

    latitude.text = [NSString stringWithFormat:@"%f",loc.latitude];

    

    longitude.text = [NSString stringWithFormat:@"%f",loc.longitude];

    

    altitude.text = [NSString stringWithFormat:@"%f",newLocation.altitude];

}

 

-(void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error{

    

    

}

 

- (void)viewDidLoad {

    [super viewDidLoad];

    // Do any additional setup after loading the view, typically from a nib.

}

 

- (void)didReceiveMemoryWarning {

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

 

@end

 

(3) 設定info.plist

點擊info.plist，在右側添加NSLocationWhenInUseUsageDescription和NSLocationAlwaysUsageDescription 

將 Value設定為YES

 

 

(4) UIView 介面設定

 點擊Main.storyboard

 加入三個Label 在 Attributes 下, Text 內填上"經度"，“緯度”，“海拔”；

 

 

加入 三個Text Field用於顯示 "經度"，“緯度”，“海拔”；

滑鼠右擊Text Field控制項 移動滑鼠在"Referencing Outlets" 後面圓圈上; 圓圈變為(+); 拖動直線串連到"view controller";
放開滑鼠選擇鍵出現 "longitude","latitude","altitude"; 對應著"經度"，“緯度”，“海拔”三個Text Field ，分別選上它。

 

選擇： File -> Save

最後在 xCode 選擇 Build and then Running

(5)真機調試

 

本文源於網上部落格教程，經過本人修改和測試。原blog地址 http://blog.sina.com.cn/s/blog_5fae23350100e5fi.html

四、衛星定位《蘋果iOS執行個體編程入門教程》