ios – 是否有必要使用单例CLLocationManager来避免等待设备位置更新？

@H_79_5@myLOCATIOn.h

@protocol MyCLControllerDelegate <NSObject>
- (void)LOCATIOnupdate:(CLLOCATIOn *)LOCATIOn; 
- (void)LOCATIOnError:(NSError *)error;
@end

@interface MyLOCATIOn : NSObject <CLLOCATIOnManagerDelegate> {

    CLLOCATIOnManager *LOCATIOnManager;
    id delegate;
}
@property (nonatomic,strong) CLLOCATIOnManager *LOCATIOnManager;
@property (nonatomic,strong) id <MyCLControllerDelegate> delegate;

#import "MyLOCATIOn.h"
@implementation MyLOCATIOn

@synthesize LOCATIOnManager;
@synthesize delegate;

- (id) init {
    self = [super init];
    if (self != nil) {

        if([CLLOCATIOnManager LOCATIOnservicesEnabled]) {
            if ([CLLOCATIOnManager authorizationStatus] == kCLAuthorizationStatusDenied || [CLLOCATIOnManager authorizationStatus] == kCLAuthorizationStatusReStricted )
            {
                [self showAlertWithtitle:@"Warning" andWithmessage:@"Determining your current LOCATIOn cAnnot be performed at this time because LOCATIOn services are enabled but reStricted"   forTargetView:self];

NSlog(@"Determining your current LOCATIOn cAnnot be performed at this time because LOCATIOn services are enabled but reStricted");

            }
            else
            {
                self.LOCATIOnManager = [[CLLOCATIOnManager alloc] init];
                self.LOCATIOnManager.delegate = self; // send loc updates to myself
                [self.LOCATIOnManager setDesiredAccuracy:kCLLOCATIOnAccuracyBest];
                [self.LOCATIOnManager setDistanceFilter:kThresholdDistance];
                [self.LOCATIOnManager startupdatingLOCATIOn];

                NSLog(@"LOCATIOn sharing set ON!");

            }


        } else {
            [MobileYakHelper showAlertWithtitle:@"Error" andWithmessage:@"Determining your current LOCATIOn cAnnot be performed at this time because LOCATIOn services are not enabled." forTargetView:self];

            NSLog(@"LOCATIOn sharing set OFF!");

        }

    }
    return self;
}

- (void)LOCATIOnManager:(CLLOCATIOnManager *)manager didupdateToLOCATIOn:(CLLOCATIOn *)newLOCATIOn fromLOCATIOn:(CLLOCATIOn *)oldLOCATIOn
{

    NSDictionary *DictValue = [NSDictionary DictionaryWithObjectsAndKeys:[NSnumber numberWithDouble:newLOCATIOn.coordinate.latitude],@"latitude",[NSnumber numberWithDouble:newLOCATIOn.coordinate.longitude],@"longitude",nil];

    [[NSUserDefaults standardUserDefaults] SETVALue:DictValue forKey:@"MY_LOCATION"];

    CLLOCATIOnDistance meters = [newLOCATIOn distanceFromLOCATIOn:oldLOCATIOn];
    if (meters >= kThresholdDistance ) {
        [self.delegate LOCATIOnupdate:newLOCATIOn];

    }
}


- (void)LOCATIOnManager:(CLLOCATIOnManager *)manager
       didFailWithError:(NSError *)error
{


    [self.delegate LOCATIOnError:error];
}



@end

要在少数控制器中使用它.在它的.h文件中使用代理,并按如下方式使用：

- (void) initializeLOCATIOns
{
    MyLOCATIOn _myLOCATIOn = [[MyLOCATIOn alloc] init];
    _myLOCATIOn.delegate = self;
    _myLOCATIOn.LOCATIOnManager.desiredAccuracy = kCLLOCATIOnAccuracyBest;
    CLLOCATIOn * currentLOCATIOn =  _myLOCATIOn.LOCATIOnManager.LOCATIOn;
        // updating user's current LOCATIOn to server
    [self sendUserCurrentCoordinate:currentLOCATIOn.coordinate];

        // start updating current LOCATIOn
    _myLOCATIOn.LOCATIOnManager.desiredAccuracy = kCLLOCATIOnAccuracyBest;
    [_myLOCATIOn.LOCATIOnManager startupdatingLOCATIOn];

    [_myLOCATIOn.LOCATIOnManager startupdatingLOCATIOn];
}

- (void)LOCATIOnupdate:(CLLOCATIOn *)LOCATIOn {


          NSLog(@"LOCATIOn %@",LOCATIOn); 
}

- (void)LOCATIOnError:(NSError *)error {

    NSLog(@"LOCATIOndescription %@",[error description]);

}