iOS软件开发 获取相册图片或照相

从相册获取相片或者照相需要实现UIImagePickerControllerDelegate, UINavigationControllerDelegate这两个协议，下面是具体的实现方法

- (void)addImage{        UIActionSheet *actionsheet = [[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];        [actionsheet showInView:self.view];}- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex{    if (buttonIndex == actionSheet.cancelButtonIndex) {    }    switch (buttonIndex) {        case 0://打开照相机            [self takePhoto];            break;        case 1://打开相册            [self localPhoto];            break;        default:            break;    }}-(void)takePhoto//打开相机{    UIImagePickerControllerSourceType sourceType = UIImagePickerControllerSourceTypeCamera;    if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {        UIImagePickerController *picker = [[UIImagePickerController alloc]init];        picker.delegate = self;        picker.allowsEditing = YES;        picker.sourceType = sourceType;        [self presentViewController:picker animated:YES completion:nil];    }}-(void)localPhoto//本地相册{    UIImagePickerController *picker = [[UIImagePickerController alloc]init];    picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;    picker.delegate = self;    picker.allowsEditing = YES;    [self presentViewController:picker animated:YES completion:nil];}-(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"]) {        //      把图片转化为NSData        UIImage *image = info[UIImagePickerControllerEditedImage];        NSData *data = UIImageJPEGRepresentation(image, 0.1);                        //      图片的保存路径        NSString *documentsPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];        NSFileManager *manager = [NSFileManager defaultManager];                //      将刚刚转化的图片放到沙盒中 并保存为png        [manager createDirectoryAtPath:documentsPath withIntermediateDirectories:YES attributes:nil error:nil];        NSString *imageName = [NSString stringWithFormat:@"/%@.png",[NSDate date]];                [manager createFileAtPath:[documentsPath stringByAppendingString:[NSString stringWithFormat:@"%@",imageName]] contents:data attributes:nil];                //得到选择后沙盒的路径        filePath = [[NSString alloc]initWithFormat:@"%@%@",documentsPath,imageName];        NSLog(@"%@",filePath);                [picker dismissViewControllerAnimated:YES completion:nil]; }- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker{        [picker dismissViewControllerAnimated:YES completion:nil];    }