{"id":10358,"date":"2022-09-23T12:37:22","date_gmt":"2022-09-23T07:07:22","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-why-is-this-code-updating-location-twice-every-time\/"},"modified":"2022-09-23T12:37:22","modified_gmt":"2022-09-23T07:07:22","slug":"solved-why-is-this-code-updating-location-twice-every-time","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-why-is-this-code-updating-location-twice-every-time\/","title":{"rendered":"[Solved] Why is this code updating location twice every time?"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-27080208\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"27080208\" data-parentid=\"27079216\" data-score=\"1\" data-position-on-page=\"1\" data-highest-scored=\"1\" data-question-has-accepted-highest-score=\"1\" itemprop=\"acceptedAnswer\" itemscope itemtype=\"https:\/\/schema.org\/Answer\">\n<div class=\"post-layout\">\n<div class=\"votecell post-layout--left\"><\/div>\n<div class=\"answercell post-layout--right\">\n<div class=\"s-prose js-post-body\" itemprop=\"text\">\n<p>After a quick look at Apple&#8217;s documentations, I&#8217;ve noticed that the delegate method you are using, <code>- locationManager:didUpdateToLocation:fromLocation:<\/code> is deprecated since iOS 6.<br \/>\nInstead, you should use <code>- locationManager:didUpdateLocations:<\/code>.  <\/p>\n<p>Try replacing your code with the code below and see if it make any difference:  <\/p>\n<p>EDIT- I&#8217;ve edit the code below to handle the double-call you get.<br \/>\nFrom your post above I see they are almost simultaneously, So basically we&#8217;ll check if at least 1 seconds has passed since last call.<br \/>\nThere are probably better ways to do it, but that was just at the top of my head&#8230;<br \/>\nHaven&#8217;t checked it in Xcode, but, if I haven&#8217;t made a typo or something, it should work.  <\/p>\n<pre><code>\/\/ ViewController.m  \n@interface ViewController ()  \n@property (nonatomic, strong) NSDate *lastUpdateTime;  \/\/ Create a property  \n@end                                                   \/\/ to hold current time  \n\n- (void)viewDidLoad {  \n    [super viewDidLoad];  \n    self.lastUpdateTime = [NSDate date];  \/\/ In viewDidLoad, 'initialize' it  \n                                          \/\/ to get the current time  \n}  \n\n- (void)locationManager:(CLLocationManager *)manager\n didUpdateLocations:(NSArray *)locations  \n{  \n    NSTimeInterval passedTime = -[self.lastUpdateTime timeIntervalSinceNow];  \n    \/\/ Here we are checking how much seconds have passed since our lastUpdateTime  \n    \/\/ Since lastUpdateTime is in the past, the result will be negative, therefore  \n    \/\/ the minus sign, so we'll get a positive number  \n\n    if(passedTime &lt; 1) {  \n        return;  \n    }  \/\/ Now we check if less than one second have passed. If so, the whole method  \n       \/\/ will return. If not, it will just continue executing\n\n    CLLocation *currentLocation = [locations lastObject];  \n    self.lastUpdateTime = [NSDate date];  \/\/ Don't forget to update the lastUpdateTime  \n                                          \/\/ To hold the new update time\n\n    if (currentLocation != nil) {  \n        NSLog(@\"Location updated: %@\", currentLocation);\n        _LatitudeLabel.text = [NSString stringWithFormat:@\"%.8f\", currentLocation.coordinate.latitude];  \n        _LongitudeLabel.text = [NSString stringWithFormat:@\"%.6f\", currentLocation.coordinate.longitude];  \n        _GPSAccuracyLabel.text = [NSString stringWithFormat:@\"%.2f\", currentLocation.horizontalAccuracy];  \n        _AltitudeLabel.text = [NSString stringWithFormat:@\"%.2f\", currentLocation.altitude];  \n        _VerticalAccuracyLabel.text = [NSString stringWithFormat:@\"%.2f\", currentLocation.verticalAccuracy];  \n    }  \n}\n<\/code><\/pre>\n<\/p><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\">7<\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved Why is this code updating location twice every time? <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] After a quick look at Apple&#8217;s documentations, I&#8217;ve noticed that the delegate method you are using, &#8211; locationManager:didUpdateToLocation:fromLocation: is deprecated since iOS 6. Instead, you should use &#8211; locationManager:didUpdateLocations:. Try replacing your code with the code below and see if it make any difference: EDIT- I&#8217;ve edit the code below to handle the double-call &#8230; <a title=\"[Solved] Why is this code updating location twice every time?\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-why-is-this-code-updating-location-twice-every-time\/\" aria-label=\"More on [Solved] Why is this code updating location twice every time?\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[470],"class_list":["post-10358","post","type-post","status-publish","format-standard","hentry","category-solved","tag-objective-c"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] Why is this code updating location twice every time? - JassWeb<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jassweb.com\/solved\/solved-why-is-this-code-updating-location-twice-every-time\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Why is this code updating location twice every time? - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] After a quick look at Apple&#8217;s documentations, I&#8217;ve noticed that the delegate method you are using, - locationManager:didUpdateToLocation:fromLocation: is deprecated since iOS 6. Instead, you should use - locationManager:didUpdateLocations:. Try replacing your code with the code below and see if it make any difference: EDIT- I&#8217;ve edit the code below to handle the double-call ... 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Instead, you should use - locationManager:didUpdateLocations:. Try replacing your code with the code below and see if it make any difference: EDIT- I&#8217;ve edit the code below to handle the double-call ... 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