从相册选取图片

今天还挺高兴的，总监让我添加一个从相册里面上传图片到自己的项目里面。。。。这个功能听着挺简单的，其实还是要动脑筋的，就是要考虑上传的图片要进行保存的问题，之前我还准备用coredata保存的，觉得太麻烦了，所以我就把选取的图片直接放到本地，下次进来是先从本地查询，如果本地有，就放本地的，如果没有就放我们默认设计的，大致思路就是这样。。。。。下面是代码

UIView *userSingInView;

UIImageView *photo;

self.photo = [[UIImageView alloc] initWithFrame:CGRectMake(2, 10, 70, 70)];

                self.photo.image = [UIImage imageNamed:@"头像140X140.png"];

                

                //判断本地是否有图片

                NSUserDefaults* preferences = [NSUserDefaults standardUserDefaults];

                NSData *imageData = [preferences objectForKey:@"image"];

                if (imageData) {

                    self.photo.image = [UIImage imageWithData:imageData];

                }

                

                [userSignInView addSubview:self.photo];

                

                UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(selectPhoto:)];

                tap.numberOfTapsRequired = 1;

                [userSignInView addGestureRecognizer:tap];

-(void)selectPhoto:(id *)sender

{

//    UIImagePickerControllerSourceType sourceType=UIImagePickerControllerSourceTypeCamera;

//    

//    if (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {

//        

//        sourceType=UIImagePickerControllerSourceTypePhotoLibrary;

//        

//    }

    

    UIImagePickerControllerSourceType sourceType=UIImagePickerControllerSourceTypePhotoLibrary;

    if (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary]) {

        

        sourceType = UIImagePickerControllerSourceTypeCamera;

        

    }

    

    UIImagePickerController * picker = [[UIImagePickerController alloc]init];

    picker.delegate = self;

    picker.allowsEditing=YES;

    picker.sourceType=sourceType;

    [self presentViewController:picker animated:YES completion:^{

    }];

}

#pragma mark --UIImagePickerControllerDelegate

-(void)imagePickerController:(UIImagePickerController*)picker didFinishPickingMediaWithInfo:(NSDictionary *)info

{

    [picker dismissModalViewControllerAnimated:YES];

    UIImage * image=[info objectForKey:UIImagePickerControllerEditedImage];

    self.photo.image=image;

    

    //将图片保存到本地

    NSUserDefaults* preferences = [NSUserDefaults standardUserDefaults];

    [preferences setObject:UIImagePNGRepresentation(image) forKey:@"image"];

}

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker

{

    [picker dismissModalViewControllerAnimated:YES];

}