ios - didUpdateLocations 到 : from: method is deprecated for latest iOS versions(12. 4)。如何用 didUpdateLocations 替换它？

Question

我正在尝试在我的示例应用程序中实现经度和纬度。我使用 iPhone 5s 设备进行测试。它不会对按钮操作的纬度和经度标签产生任何影响。
在编译 Xcode 之前，在 didUpdateToLocation: fromLocation: method as 行显示警告
“实现已弃用的方法”
请帮助我使用合适的方法来代替此方法以使应用程序顺利运行
使用 Xcode 12.4 和使用 objective-c 的 iOS 12.3 我试图实现一个简单的位置演示应用程序，它显示经度和纬度。下面是我的 viewController.h 和 viewController.m 文件。我已经尝试过以下来自在线教程的代码 AppCoda
viewController.h

#import <UIKit/UIKit.h>
#import <CoreLocation/CoreLocation.h>
@interface ViewController :UIViewController<CLLocationManagerDelegate>
{
  IBOutlet UILabel *lattitudeLabel;
  IBOutlet UILabel *longitudeLabel;
  IBOutlet UILabel *addressLabel;
}
- (IBAction)getCurrentLocation:(UIButton *)sender;
@end

viewController.m

#import "ViewController.h"

@interface ViewController ()
{
  CLLocationManager *locationManager;
  CLGeocoder *geocoder;
  CLPlacemark *placemark;
}

@end

@implementation ViewController

- (void)viewDidLoad {
[super viewDidLoad];
  locationManager = [[CLLocationManager alloc]init];
  geocoder = [[CLGeocoder alloc] init];
}


- (IBAction)getCurrentLocation:(UIButton *)sender
{
  locationManager.delegate = self;
  locationManager.desiredAccuracy = kCLLocationAccuracyBest;
  [locationManager startUpdatingLocation];
}
#pragma mark - CLLocationManagerDelegate

- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *)error
{
NSLog(@"didFailWithError: %@", error);
  NSLog(@"Error: Failed to get location");
}

- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
{
NSLog(@"didUpdateToLocation: %@", newLocation);
CLLocation *currentLocation = newLocation;

if (currentLocation != nil) {
longitudeLabel.text = [NSString stringWithFormat:@"%.8f", currentLocation.coordinate.longitude];
lattitudeLabel.text = [NSString stringWithFormat:@"%.8f", currentLocation.coordinate.latitude];
}
  
  [locationManager stopUpdatingLocation];
  
  NSLog(@"Resolving the Address");
  [geocoder reverseGeocodeLocation:currentLocation completionHandler:^(NSArray *placemarks, NSError *error) {
      NSLog(@"Found placemarks: %@, error: %@", placemarks, error);
      if (error == nil && [placemarks count] > 0) {
        self->placemark = [placemarks lastObject];
        self->addressLabel.text = [NSString stringWithFormat:@"%@ %@\n%@ %@\n%@\n%@",
                       self->placemark.subThoroughfare, self->placemark.thoroughfare,
                       self->placemark.postalCode, self->placemark.locality,
                       self->placemark.administrativeArea,
                       self->placemark.country];
      } else {
      NSLog(@"%@", error.debugDescription);
      }
  } ];
}
@end

单击按钮获取我的位置没有任何事情发生。它实际上应该更新除了经度:和纬度:一些浮点值之外的坐标..但它没有这样做..我会问请给我建议任何教程网站或任何GitHub项目的链接，以便在iOS 12.3中进行位置处理和以上在 objective-c ...感谢您的答复和建议的编辑。

Answer 1

如docs说，只需使用 locationManager(_:didUpdateLocations:) .
swift 5

func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
    // Stop updates if this is a one-time request
    manager.stopUpdatingLocation()
    
    // Pop the last location off if you just need current update
    guard let newLocation = locations.last else { return }
    
    <... Do something with the location ...>
}

Objective-C

- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray<CLLocation *> *)locations {
    [manager stopUpdatingLocation];

    CLLocation *newLocation = [locations lastObject];
    if (newLocation) {
        <... Do something with the location ...>
    }
}