从相机或是相册选取照片

getPhoto.m

#pragma mark - UIActionSheetDelegate

- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
    if (buttonIndex == 0) {
        [self takePhoto];
    } else if (buttonIndex == 1) {
        [self choosePhotoFromLibrary];
    }
}

#pragma mark - Private Method

// Call this method in button's action 
// Remember add UIActionSheetDelegate to the class extension
- (void)showPhotoMenu {
    if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
        UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:nil
                                                                 delegate:self
                                                        cancelButtonTitle:@"Cancel"
                                                   destructiveButtonTitle:nil
                                                        otherButtonTitles:@"Take Photo", @"Choose From Library", nil];
        [actionSheet showInView:self.view];
    } else {
        [self choosePhotoFromLibrary];
    }
}

// Take photo by camera
- (void)takePhoto {
    UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
    imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
    
    imagePicker.delegate = self;
    imagePicker.allowsEditing = YES;
    [self presentViewController:imagePicker animated:YES completion:nil];
}

// choose photo from library
- (void)choosePhotoFromLibrary {
    UIImagePickerController *imageController = [[UIImagePickerController alloc] init];
    imageController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    
    imageController.delegate = self;
    imageController.allowsEditing = YES;
    [self presentViewController:imageController animated:YES completion:nil];
}