不导入框架为什么有时崩溃有时不崩溃

 1 #import "ViewController.h"
 2 #import <CoreLocation/CoreLocation.h>
 3 
 4 @interface ViewController ()
 5 @property (weak, nonatomic) IBOutlet UITextField *addressTF;
 6 @property (weak, nonatomic) IBOutlet UILabel *longitudeLabel;
 7 @property (weak, nonatomic) IBOutlet UILabel *latitudeLabel;
 8 @property (weak, nonatomic) IBOutlet UILabel *detailLabel;
 9 
10 @end
11 
12 @implementation ViewController
13 
14 - (void)viewDidLoad {
15     [super viewDidLoad];
16     // Do any additional setup after loading the view, typically from a nib.
17 }
18 
19 //地理编码
20 - (IBAction)geocode {
21     //创建地理编码对象
22     CLGeocoder * geocoder = [[CLGeocoder alloc]init];
23     
24     if (self.addressTF.text == nil) {
25         return ;
26     }
27     
28     [geocoder geocodeAddressString:self.addressTF.text completionHandler:^(NSArray<CLPlacemark *> * _Nullable placemarks, NSError * _Nullable error) {
29         if (error) {
30             NSLog(@"%@",error);
31             return ;
32         }
33         //获取地标 CLPlacemark
34         for (CLPlacemark * placemark in placemarks) {
35             self.longitudeLabel.text = [NSString stringWithFormat:@"%f",placemark.location.coordinate.longitude];
36             self.latitudeLabel.text = [NSString stringWithFormat:@"%f",placemark.location.coordinate.latitude];
37             self.detailLabel.text = placemark.name;//具体地名
38             NSLog(@"%@",placemark.locality);//城市名
39         }
40         
41     }];
42     
43     
44 }
45 
46 @end

 1 #import "ViewController.h"
 2 #import <MapKit/MapKit.h>
 3 
 4 @interface ViewController ()
 5 
 6 @end
 7 
 8 @implementation ViewController
 9 
10 - (void)viewDidLoad {
11     [super viewDidLoad];
12     // Do any additional setup after loading the view, typically from a nib.
13 }
14 
15 
16 - (void)didReceiveMemoryWarning {
17     [super didReceiveMemoryWarning];
18     // Dispose of any resources that can be recreated.
19 }
20 
21 
22 @end