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想用你的iPhone 显示你现在的位置吗？现在就看看小编为大家整理的iOS中进行卫星定位的实例编程吧！

纲要：

- 在程序显示前运行代码 -

- 加入CoreLocation Frameworks -

- 关于iPhone的“Utility Application” 运用 -

- CLLocationManager 代码运用 -

首先运行以安装好的 xCode

选择: File->New Project.

从 "New Project" 窗口

选择 : iPhone OS ->Applications-> Utility Application

命名 : 我这里命名为 “WhereAmI”

(1)  在Project文件上右键点击 Linked Frameworks and Libraries->"+"->Existing Framework;在Frameworks文件夹下选择 CoreLocation.framework, 按Add

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(2)  在xCode打开 MainView.h 文件,加入下面代码

#import

#import

#import

@interface MainView : UIView {

IBOutlet UITextField *altitude;

IBOutlet UITextField *latitude;

IBOutlet UITextField *longitude;

CLLocationManager   *locmanager;

BOOL                wasFound;

}

- (IBAction)update;

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

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

@end

(3)  在xCode打开 MainView.m 文件,加入下面代码

#import "MainView.h"

@implementation MainView

- (IBAction)update {

locmanager = [[CLLocationManager alloc] init];

[locmanager setDelegate:self];

[locmanager setDesiredAccuracy:kCLLocationAccuracyBest];

[locmanager startUpdatingLocation];

}

CLLocationManager* locmanager;

-(void)awakeFromNib {

[self update];

}

- (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

{

}

- (id)initWithFrame:(CGRect)frame {

if (self = [super initWithFrame:frame]) {

// Initialization code

}

return self;

}

- (void)drawRect:(CGRect)rect {

// Drawing code

}

- (void)dealloc {

[super dealloc];

}

(4) UIView 界面设置

双击文件： "main.xib" ;

然后 "Interface Builder"  会自动打开，在这里我们可以编辑改变界面

(5) 加入Label 在 Attributes 下, Text 内填上"经度"

(6) 加入 Text Field ; 显示:经度

选择: Tools -> Library ; 从Library显示菜单中拖拉一个 Text Field 到 Main View

在主视窗口或文件窗口;点击 Text Field

选择: Tools -> Connection Inspector

移动鼠标在"Referencing Outlets" 后面圆圈上; 圆圈变为(+); 拖向直线连接到"Main View";

放开鼠标选择键出现 "longitude"; 选上它。