选择图片——相机与相册

- (IBAction)touchSelectImg:(id)sender {
    //在这里呼出下方菜单按钮项
    UIActionSheet *myActionSheet = [[UIActionSheet alloc]
                     initWithTitle:nil
                     delegate:self
                     cancelButtonTitle:@"取消"
                     destructiveButtonTitle:nil
                     otherButtonTitles: @"打开照相机", @"从手机相册获取",nil];
    [myActionSheet showInView:self.view];
}

<UINavigationControllerDelegate,UIImagePickerControllerDelegate,UIActionSheetDelegate>

- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
{
    //呼出的菜单按钮点击后的响应
    if (buttonIndex == actionSheet.cancelButtonIndex){
        NSLog(@"取消");
    }else{
        switch (buttonIndex){
            case 0:  //打开照相机拍照
                [self takePhoto];
                break;
            case 1:  //打开本地相册
                [self LocalPhoto];
                break;
        }
    }
}
//开始拍照
-(void)takePhoto
{
    UIImagePickerControllerSourceType sourceType = UIImagePickerControllerSourceTypeCamera;
    if ([UIImagePickerController isSourceTypeAvailable: UIImagePickerControllerSourceTypeCamera])
    {
        UIImagePickerController *picker = [[UIImagePickerController alloc] init];
        picker.delegate = self;
        //设置拍照后的图片可被编辑
        picker.allowsEditing = YES;
        picker.sourceType = sourceType;
        [self presentViewController:picker animated:YES completion:nil];
    }else
    {
        NSLog(@"模拟其中无法打开照相机,请在真机中使用");
    }
}
//打开本地相册
-(void)LocalPhoto
{
    UIImagePickerController *picker = [[UIImagePickerController alloc] init];
    picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    picker.delegate = self;
    //设置选择后的图片可被编辑
    picker.allowsEditing = YES;
    [self presentViewController:picker animated:YES completion:nil];
}
//当选择一张图片后进入这里
-(void)imagePickerController:(UIImagePickerController*)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    NSString *type = [info objectForKey:UIImagePickerControllerMediaType];
    //当选择的类型是图片
    if ([type isEqualToString:@"public.image"])
    {
        UIImage* image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];
        [picker dismissViewControllerAnimated:YES completion:nil];
    }
}
//您取消了选择图片
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
{
    NSLog(@"您取消了选择图片");
    [picker dismissViewControllerAnimated:YES completion:nil];
}