相机和相册的调用

来源：互联网发布：三层网络ping 请求超时编辑：程序博客网时间：2024/04/30 02:03

.h文件中添加代理

UIImagePickerControllerDelegate,UINavigationControllerDelegate,

判断是什么样的设备

-(void)RightBtnAction:(UIBarButtonItem *)sender{    UIActionSheet *sheet;    //判断是否可以打开相机,模拟器,ipad的此功能无法使用    if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])    {        sheet = [[UIActionSheet alloc] initWithTitle:@"选择" delegate:self cancelButtonTitle:nil destructiveButtonTitle:@"取消" otherButtonTitles:@"拍照",@"从相册选取", nil];            }    else    {        sheet = [[UIActionSheet alloc] initWithTitle:@"选择" delegate:self cancelButtonTitle:nil destructiveButtonTitle:@"取消" otherButtonTitles:@"从相册选取", nil];    }        sheet.tag = 255;        [sheet showInView:self.view];}

根据设备选择是相机类型还是相册类型

#pragma mark --ActionSheet---(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex{    if (actionSheet.tag == 255)    {        NSUInteger sourceType = 0;                //判断是否支持相机        if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {                        switch (buttonIndex) {                case 0:                {                    //取消                    break;                }                case 1:                {                    //相机                    sourceType = UIImagePickerControllerSourceTypeCamera;                    break;                }                case 2:                {                    //相册                    sourceType = UIImagePickerControllerSourceTypePhotoLibrary;                    break;                }                                                        default:                    break;            }        }        else        {            if (buttonIndex == 0)            {                return;            }            else            {                sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;            }        }                        UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];                imagePickerController.delegate = self;                imagePickerController.allowsEditing = YES;                imagePickerController.sourceType = sourceType;                [self presentViewController:imagePickerController animated:YES completion:^{                    }];    }}

实现相机,相册的代理方法

#pragma mark---相机照相代理方法--- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(NSDictionary *)editingInfo{    UIImageWriteToSavedPhotosAlbum(image, self, @selector(image:didFinishSavingWithError:contextInfo:), nil);}#pragma mark--照相照得相片保存到UIImagePickerController--- (void)image:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo{    if (error != NULL) {        UIAlertView *photoSave = [[UIAlertView alloc] initWithTitle:nil message:[NSString stringWithFormat:@"%@",error] delegate:nil cancelButtonTitle:nil otherButtonTitles:nil];        [photoSave show];        [photoSave dismissWithClickedButtonIndex:0 animated:YES];//        [photoSave release];        photoSave = nil;    }else {        UIAlertView *photoSave = [[UIAlertView alloc] initWithTitle:@"\n\n保存成功" message:nil delegate:nil cancelButtonTitle:nil otherButtonTitles:nil];        [photoSave show];        [photoSave dismissWithClickedButtonIndex:0 animated:YES];//        [photoSave release];        photoSave = nil;        [self dismissViewControllerAnimated:YES completion:nil];    }}//相机的代理方法#pragma mark --image picker delegate-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{    [picker dismissViewControllerAnimated:YES completion:^{            }];        UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];    /* 此处info 有六个值     * UIImagePickerControllerMediaType; // an NSString UTTypeImage)     * UIImagePickerControllerOriginalImage;  // a UIImage 原始图片     * UIImagePickerControllerEditedImage;    // a UIImage 裁剪后图片     * UIImagePickerControllerCropRect;       // an NSValue (CGRect)     * UIImagePickerControllerMediaURL;       // an NSURL     * UIImagePickerControllerReferenceURL    // an NSURL that references an asset in the AssetsLibrary framework     * UIImagePickerControllerMediaMetadata    // an NSDictionary containing metadata from a captured photo    */        // 保存图片至本地，方法见下文       [self saveImage:image withName:@"currentImage.png"];        NSString *fullPath = [[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"] stringByAppendingPathComponent:@"currentImage.png"];        UIImage *savedImage = [[UIImage alloc] initWithContentsOfFile:fullPath];        isFullScreen = NO;        switch (count) {        case 0:            [[dataSource objectAtIndex:0] setImage:savedImage];            break;        case 1:            [[dataSource objectAtIndex:1] setImage:savedImage];            break;        default:            [[dataSource objectAtIndex:0] setImage:savedImage];            break;    }    //    [self.imageView setImage:savedImage];        [collectionview reloadData];     self.imageView.tag = 100;        count++;}-(void)imagePickerControllerDidCancel:(UIImagePickerController *)picker{    [self dismissViewControllerAnimated:YES completion:^{            }];}#pragma mark --保存图片至沙盒-(void)saveImage:(UIImage *)currentImage withName:(NSString *)imageName{    //此方法可将图片压缩，但是图片质量基本不变，第二个参数即图片质量参数。    NSData *imageData = UIImageJPEGRepresentation(currentImage, 0.5);        //获取沙盒目录    NSString *fullPath = [[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"] stringByAppendingPathComponent:imageName];        //将图片写入文件        [imageData writeToFile:fullPath atomically:NO];    }

0 0