圖片多選的實現(xiàn) 分為兩部分
1 調(diào)用相機拍照添加圖片
2 打開相冊添加圖片

1 使用相機添加圖片

-(void)addimagePicker{
// 遵守UIImagePickerControllerDelegate 協(xié)議創(chuàng)建imagePicker對象
    UIImagePickerController *pickercontroller = [[UIImagePickerController alloc]init];
    pickercontroller.allowsEditing = YES ;
    pickercontroller.delegate = self ;
    _pickercontroller = pickercontroller ;
}

調(diào)用相機時進行如下設置
_pickercontroller.sourceType = UIImagePickerControllerSourceTypeCamera ;
            // 默認是打開相機 也可以設置為錄制視頻
            _pickercontroller.cameraCaptureMode = UIImagePickerControllerCameraCaptureModePhoto ;
            [self presentViewController:_pickercontroller animated:YES completion:nil];

實現(xiàn)imagePicker 的代理方法（拍照完成獲取image）
// 用戶選中某條媒體信息之后的處理
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info{
    // 獲取媒體類型（相機 or 相冊 or 視頻 ）
    NSString *mediatype = [info objectForKey:UIImagePickerControllerMediaType];
    if ([mediatype isEqualToString:@"public.image"]) {
        UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];
        // 將拍好的圖片存入系統(tǒng)相冊
        UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil);
        // 對圖片數(shù)據(jù)進行壓縮
        NSData *data = UIImageJPEGRepresentation(image, 0.2);     
        UIImage *resultimage = [[UIImage alloc]initWithData:data];
}

打開相冊添加圖片
使用第三方QBImagePicker 實現(xiàn)
1 遵守協(xié)議
QBImagePickerControllerDelegate
2 創(chuàng)建圖片選擇器對象

-(void)addQBImagePicker{
    QBImagePickerController *imagePickerController = [QBImagePickerController new];
    imagePickerController.delegate = self;
    imagePickerController.mediaType = QBImagePickerMediaTypeAny;
    imagePickerController.allowsMultipleSelection = 20;
    imagePickerController.showsNumberOfSelectedAssets = YES;
    _qbimagepicker = imagePickerController ;
}

3 實現(xiàn)代理方法

- (void)qb_imagePickerController:(QBImagePickerController *)imagePickerController didFinishPickingAssets:(NSArray *)assets
{
    PHImageRequestOptions *options = [[PHImageRequestOptions alloc] init];
    options.deliveryMode = PHImageRequestOptionsDeliveryModeHighQualityFormat;

    for (PHAsset *asset in assets) {
        
        [[PHImageManager defaultManager] requestImageForAsset:asset targetSize:[UIScreen mainScreen].bounds.size contentMode:PHImageContentModeAspectFit options:options resultHandler:^(UIImage *result, NSDictionary *info) {
            NSDictionary *dic = @{@"image":result,@"isselect":@"0"};
            [_selectArr addObject:dic];
            if (_selectArr.count == assets.count) {
                // 先確定范圍 range
                NSRange range = NSMakeRange(_dataArr.count-1,_selectArr.count);
                // 創(chuàng)建一個indexset對象
                NSIndexSet *set = [NSIndexSet indexSetWithIndexesInRange:range];
                // 插入數(shù)組中的元素
            [_dataArr insertObjects:_selectArr atIndexes:set];
            [_selectArr removeAllObjects];
            [_collectionView reloadData];
            }
        }];
    }

    [self dismissViewControllerAnimated:YES completion:NULL];
}

- (void)qb_imagePickerControllerDidCancel:(QBImagePickerController *)imagePickerController
{
    [self dismissViewControllerAnimated:YES completion:NULL];
}