相机学习

[objc] view plaincopy

1. @interface ViewController ()<UIImagePickerControllerDelegate,UINavigationControllerDelegate>  
2. @property (weak, nonatomic) IBOutlet UIImageView *imView;  
3.   
4. @end  
5.   
6. @implementation ViewController  
7. {  
8.     UIImagePickerController *_imPicker;  
9. }  
10.   
11. - (IBAction)takePicture:(id)sender  
12. {  
13.     //make sure camera is available  
14.     if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera] == NO)  
15.     {  
16.         //camera is not available  
17.         return;  
18.     }  
19.     if (_imPicker == nil) {  
20.         _imPicker = [[UIImagePickerController alloc] init];  
21.         _imPicker.delegate = self;  
22.         _imPicker.sourceType = UIImagePickerControllerSourceTypeCamera;  
23.     }  
24.     [self presentViewController:_imPicker animated:YES completion:nil];  
25. }  

取图片

[objc] view plaincopy

1. - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info  
2. {  
3.     UIImage *im = [info objectForKey:UIImagePickerControllerOriginalImage];  
4.     [_imView setImage:im];  
5.     _imView.contentMode = UIViewContentModeScaleAspectFill;  
6.     [self dismissViewControllerAnimated:YES completion:nil];  
7. }  

取消图片选择

[objc] view plaincopy

1. - (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker  
2. {  
3.     [self dismissViewControllerAnimated:YES completion:nil];  
4. }  

实现可编辑

[objc] view plaincopy

1. - (IBAction)takePicture:(id)sender  
2. {  
3.     //make sure camera is available  
4.     if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera] == NO)  
5.     {  
6.         //camera is not available  
7.         return;  
8.     }  
9.     if (_imPicker == nil) {  
10.         _imPicker = [[UIImagePickerController alloc] init];  
11.         _imPicker.delegate = self;  
12.         _imPicker.sourceType = UIImagePickerControllerSourceTypeCamera;  
13.         _imPicker.allowsEditing = YES;//相机界面处于可编辑状态  
14.     }  
15.     [self presentViewController:_imPicker animated:YES completion:nil];  
16. }  
17.   
18.   
19. - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info  
20. {  
21.     UIImage *im = [info objectForKey:UIImagePickerControllerEditedImage];//修改key  
22.     UIImageWriteToSavedPhotosAlbum(im, nil, nil, nil);//保存到相册  
23.     [_imView setImage:im];  
24.     _imView.contentMode = UIViewContentModeScaleAspectFill;  
25.     [self dismissViewControllerAnimated:YES completion:nil];  
26. }