调去系统照相机或者从本地相册获取图片.

桃扇骨 2022-08-06 13:06 184阅读 0赞

# ![Center][]![Center 1][]![Center 2][]1.首先要遵守三个协议 #

UIActionSheetDelegate,UINavigationControllerDelegate,UIImagePickerControllerDelegate

2.主要代码

//选择头像
    - (IBAction)handleSelectImage:(id)sender {
        self.myActionSheet = [[UIActionSheet alloc]
                        initWithTitle:nil
                        delegate:self
                        cancelButtonTitle:@"取消"
                        destructiveButtonTitle:nil
                        otherButtonTitles:@"打开照相机",@"从相册中获取", nil];
        [self.myActionSheet showInView:self.view];
    }
    #pragma mark - UIActionSheetDelegate
    - (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex{
        if (buttonIndex == self.myActionSheet.cancelButtonIndex) {
            NSLog(@"你取消了");
        }
        switch (buttonIndex) {
            case 0:
                [self takePhoto];
                break;
            case 1:
                [self localPhoto];
                break;
            default:
                break;
        }
    }
    //照相
    - (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");
        }
    }
    //选取本地图片
    - (void)localPhoto{
        UIImagePickerController *picker = [[UIImagePickerController alloc] init];
        picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
        picker.delegate = self;
        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"])
        {
            //先把图片转成NSData
            UIImage* image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];
            NSData *data;
            if (UIImagePNGRepresentation(image) == nil)
            {
                data = UIImageJPEGRepresentation(image, 1.0);
            }
            else
            {
                data = UIImagePNGRepresentation(image);
            }
            
            //图片保存的路径
            //这里将图片放在沙盒的documents文件夹中
            NSString * DocumentsPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];
            
            //文件管理器
            NSFileManager *fileManager = [NSFileManager defaultManager];
            
            //把刚刚图片转换的data对象拷贝至沙盒中 并保存为image.png
            [fileManager createDirectoryAtPath:DocumentsPath withIntermediateDirectories:YES attributes:nil error:nil];
            [fileManager createFileAtPath:[DocumentsPath stringByAppendingString:@"/image.png"] contents:data attributes:nil];
            
            //得到选择后沙盒中图片的完整路径
            self.filePath = [[NSString alloc]initWithFormat:@"%@%@",DocumentsPath,  @"/image.png"];
            
            //关闭相册界面
            [picker dismissViewControllerAnimated:YES completion:nil];
            
            //创建一个选择后图片的小图标放在下方
            //类似微薄选择图后的效果
            UIImageView *smallimage = [[UIImageView alloc] initWithFrame:
                                        CGRectMake(110, 390, 75, 40)];
            
            smallimage.image = image;
            //加在视图中
            [self.imageSelectBtn removeFromSuperview];//移除button
            [self.view addSubview:smallimage];
            
        }
        
    }

<pre name="code" class="objc">- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
    {
        NSLog(@"您取消了选择图片");
        [picker dismissViewControllerAnimated:YES completion:nil];
    }

[Center]: https://img-blog.csdn.net/20150126174328320?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvZHVvZHVvXzMzMw==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center
[Center 1]: https://img-blog.csdn.net/20150126174343608?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvZHVvZHVvXzMzMw==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center
[Center 2]: /images/20220806/e034f7513c614bc09ba2705523edab53.png