iOS 关于图片地理位置隐私信息的分析和读取

Posted 2020-07-26 李洪强

今天突然想到微信朋友圈发照片，涉及个人隐私的地理位置是否外泄。因为iphone拍照的照片都会带有地理位置等信息，我们先来实现怎么读取里面的安全信息，然后再来分析

 

[objc] view plain copy

 

1. #import "ViewController.h"  
2. #import <ImageIO/ImageIO.h>  
3. #import <AssetsLibrary/AssetsLibrary.h>  
4. @interface ViewController ()<UIImagePickerControllerDelegate,UINavigationControllerDelegate>  
5.   
6. @end  
7.   
8. @implementation ViewController  
9.   
10. - (void)viewDidLoad {  
11.     [super viewDidLoad];  
12.      
13.       
14.     //创建一个UIImagePickerController对象  
15.     UIImagePickerController *ctrl = [[UIImagePickerController alloc] init];  
16.     //设置类型  
17.     ctrl.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;  
18.     //设置代理  
19.     ctrl.delegate = self;  
20.       
21.     //显示  
22.     [self presentViewController:ctrl animated:YES completion:nil];  
23.       
24.   
25.       
26.       
27. }  
28.   
29. -(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info  
30. {  
31.   
32.       
33.       
34.     if(picker.sourceType == UIImagePickerControllerSourceTypePhotoLibrary){  
35.         //UIImage *image= [info objectForKey:UIImagePickerControllerOriginalImage];  
36.           
37.         NSURL *assetURL = [info objectForKey:UIImagePickerControllerReferenceURL];  
38.           
39.         ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];  
40.         [library assetForURL:assetURL  
41.                  resultBlock:^(ALAsset *asset) {  
42.                      NSDictionary* imageMetadata = [[NSMutableDictionary alloc] initWithDictionary:asset.defaultRepresentation.metadata];  
43.   
44.                        
45.                      NSDictionary *GPS = [imageMetadata objectForKey:(NSString *)kCGImagePropertyGPSDictionary];  
46.                      NSLog(@"－－－－－－－－%@",GPS);//地理位置信息  
47.                      NSLog(@"%@",imageMetadata);   
48.                       
49.                  }   
50.                 failureBlock:^(NSError *error) {   
51.                 }];   
52.     }  
53.       
54.       
55. }