学步园

有时候需要获取手机的地理位置，当程序关闭的时候，也可以获取地理位置并且上传到服务器端。苹果在后台可以运行的程序，只有三种，一个是声音，一个是获取地理位置。下面主要说一下在后台获取地理位置，并且定时发送到服务器端。
实现非常简单，首先在info.plist中添加属性：


通过下面的代码获取地理位置：
#import “MyCLController.h”

@implementation MyCLController

@synthesize locationManager;
@synthesize delegate;

- (id) init {
self = [super init];
if (self != nil) {
self.locationManager = [[[CLLocationManager alloc] init] autorelease];
self.locationManager.delegate = self; // send loc updates to myself
}
return self;
}

- (void)locationManager:(CLLocationManager *)manager
didUpdateToLocation:(CLLocation *)newLocation
fromLocation:(CLLocation *)oldLocation
{
NSLog(@”dsdsds===>>>%f”,newLocation.coordinate.latitude);
[self.delegate locationUpdate:newLocation];
}


- (void)locationManager:(CLLocationManager *)manager
didFailWithError:(NSError *)error
{
[self.delegate locationError:error];
}

- (void)dealloc {
[self.locationManager release];
[super dealloc];
}
@end




在添加一个定时器，就可以定时发送数据。

[NSTimer scheduledTimerWithTimeInterval:(1.0) target:self selector:@selector(onTimer) userInfo:nil repeats:YES];

2012-05-13 16:58:59.827 HelloThere[5339:707] receivedData length—->8345
2012-05-13 16:58:59.977 HelloThere[5339:707] dsdsds===>>>40.009185
2012-05-13 16:58:59.979 HelloThere[5339:707] sss==2012-05-13 08:58:59 +0000
2012-05-13 16:59:00.753 HelloThere[5339:707] xxxxxx29
2012-05-13 16:59:00.828 HelloThere[5339:707] connectionDidFinishLoading
2012-05-13 16:59:00.829 HelloThere[5339:707] receivedData length—->8345
2012-05-13 16:59:01.001 HelloThere[5339:707] dsdsds===>>>40.009185
2012-05-13 16:59:01.003 HelloThere[5339:707] sss==2012-05-13 08:59:00 +0000
2012-05-13 16:59:01.753 HelloThere[5339:707] xxxxxx30
2012-05-13 16:59:01.827 HelloThere[5339:707] connectionDidFinishLoading
2012-05-13 16:59:01.828 HelloThere[5339:707] receivedData length—->8345
2012-05-13 16:59:02.019 HelloThere[5339:707] dsdsds===>>>40.009185
2012-05-13 16:59:02.021 HelloThere[5339:707] sss==2012-05-13 08:59:02 +0000
2012-05-13 16:59:02.754 HelloThere[5339:707] xxxxxx31
2012-05-13 16:59:02.826 HelloThere[5339:707] connectionDidFinishLoading
2012-05-13 16:59:02.828 HelloThere[5339:707] receivedData length—->8345
2012-05-13 16:59:03.103 HelloThere[5339:707] dsdsds===>>>40.009185
2012-05-13 16:59:03.105 HelloThere[5339:707] sss==2012-05-13 08:59:03 +0000
2012-05-13 16:59:03.754 HelloThere[5339:707] xxxxxx32
2012-05-13 16:59:03.830 HelloThere[5339:707] connectionDidFinishLoading
2012-05-13 16:59:03.833 HelloThere[5339:707] receivedData length—->8345
2012-05-13 16:59:03.995 HelloThere[5339:707] dsdsds===>>>40.009230
2012-05-13 16:59:03.997 HelloThere[5339:707] sss==2012-05-13 08:59:03 +0000
2012-05-13 16:59:04.753 HelloThere[5339:707] xxxxxx33
2012-05-13 16:59:04.790 HelloThere[5339:707] connectionDidFinishLoading
2012-05-13 16:59:04.792 HelloThere[5339:707] receivedData length—->8345
2012-05-13 16:59:05.009 HelloThere[5339:707] dsdsds===>>>40.009230
2012-05-13 16:59:05.011 HelloThere[5339:707] sss==2012-05-13 08:59:05 +0000
2012-05-13 16:59:05.753 HelloThere[5339:707] xxxxxx34
2012-05-13 16:59:05.825 HelloThere[5339:707] connectionDidFinishLoading
2012-05-13 16:59:05.828 HelloThere[5339:707] receivedData length—->8345
2012-05-13 16:59:06.021 HelloThere[5339:707] dsdsds===>>>40.009230
2012-05-13 16:59:06.023 HelloThere[5339:707] sss==2012-05-13 08:59:06 +0000
2012-05-13 16:59:06.753 HelloThere[5339:707] xxxxxx35
2012-05-13 16:59:06.823 HelloThere[5339:707] connectionDidFinishLoading
2012-05-13 16:59:06.824 HelloThere[5339:707] receivedData length—->8345
2012-05-13 16:59:07.153 HelloThere[5339:707] dsdsds===>>>40.009230
2012-05-13 16:59:07.155 HelloThere[5339:707] sss==2012-05-13 08:59:07 +0000
2012-05-13 16:59:07.753 HelloThere[5339:707] xxxxxx36
2012-05-13 16:59:07.826 HelloThere[5339:707] connectionDidFinishLoading

2012-05-13 16:59:07.828 HelloThere[5339:707] receivedData length—->8345

转载：http://peixun.eol.cn/company/company_article_detail.php?articleid=22692

源代码：http://easymorse-iphone.googlecode.com/svn/trunk/HelloThere/