開(kāi)啟后臺(tái)定位，實(shí)時(shí)向服務(wù)器發(fā)送最新位置

第一步亚情，開(kāi)啟后臺(tái)模式妄痪，選中定位，選擇project --> capabilities-->Backgorund Modes --> Location updates 如圖：

第二步楞件，在info.list 文件中添加如下配置：
允許 http 請(qǐng)求 衫生，ios 9 之后需要添加，便于向服務(wù)器發(fā)送請(qǐng)求
?<key>NSAppTransportSecurity</key> ?
<dict>
<key>NSAllowsArbitraryLoads</key> ?
<true/>
? </dict>
添加定位權(quán)限土浸，ios8之后需要添加罪针，否則無(wú)法定位
?<key>NSLocationWhenInUseUsageDescription</key>?
<string>YES</string>
?<key>NSLocationAlwaysUsageDescription</key>?
<string>YES</string>

第三步，代碼如下：

#import "ViewController.h"?
@interface ViewController ()?
@end??

@implementation ViewController?
- (void)viewDidLoad
 {   
  ?   [super viewDidLoad];   ? 
    self.view.backgroundColor = [UIColor whiteColor];    ?    
    self.title = @"后臺(tái)定位";    ?    
    self.locationManager = [[CLLocationManager alloc] init];    ?         
    self.locationManager.delegate = self;      ?   
   [self.locationManager setDesiredAccuracy:kCLLocationAccuracyBest];    ?   

 if ([[UIDevice currentDevice].systemVersion floatValue] > 8)     
{?        
    /** 請(qǐng)求用戶權(quán)限：分為：只在前臺(tái)開(kāi)啟定位  /在后臺(tái)也可定位栅迄， */?        
    /** 只在前臺(tái)開(kāi)啟定位 */?         
//      [self.locationManager requestWhenInUseAuthorization];?         
    /** 后臺(tái)也可以定位 */         ?       
        [self.locationManager requestAlwaysAuthorization];     ?   
 }    ?   
  if ([[UIDevice currentDevice].systemVersion floatValue] > 9)    
 {?        
  /** iOS9新特性：將允許出現(xiàn)這種場(chǎng)景：同一app中多個(gè)location manager：一些只能在前臺(tái)定位站故，另一些可在后臺(tái)定位（并可隨時(shí)禁止其后臺(tái)定位）皆怕。 
*/   ?       
    [self.locationManager setAllowsBackgroundLocationUpdates:YES];?  
   }    
 ?    /** 開(kāi)始定位 */     ?  
    [self.locationManager startUpdatingLocation];
 ?}?

#pragma mark -  定位代理方法
?- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray<CLLocation *> *)locations
 {    ?      
      CLLocation *loc = [locations objectAtIndex:0];   
 ?      NSLog(@"經(jīng)緯度  %f  %f ",loc.coordinate.latitude,loc.coordinate.longitude);    ?      
      NSURLSession *session = [NSURLSession sharedSession];   ?    
      NSURLSessionDataTask *task = [session dataTaskWithRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"http://ac.ybjk.com/ua.php"]] completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) 
      {
          NSLog(@"response  %@",response);    
      ?    NSString *result = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];       ?       
          NSLog(@"result %@",result);     ?   
      }];      ? 
     [task resume];
 ?}   
@end
?```
至此毅舆，完成后臺(tái)實(shí)時(shí)定位功能西篓，并向服務(wù)器發(fā)送請(qǐng)求成功！