1.从系统相册中读取
/*
判断选择的读取类型是否支持
UIImagePickerControllerSourceTypePhotoLibrary,普通相册
UIImagePickerControllerSourceTypeCamera, 镜头（拍照、录视频）
UIImagePickerControllerSourceTypeSavedPhotosAlbum（自己保存的图片）
*/
if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary]) {
self.imagePC = [[UIImagePickerController alloc] init];
_imagePC.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
//相册操作由代理来监听 取消还是选择完成
_imagePC.delegate = self;
//展示相册
[self presentViewController:_imagePC animated:YES completion:nil];
}
2.拍照录视频
if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
self.imagePC = [[UIImagePickerController alloc] init];
_imagePC.delegate = self;
_imagePC.sourceType = UIImagePickerControllerSourceTypeCamera;
//图片 public.image
//视频 public.movie
_imagePC.mediaTypes = @[@"public.movie"];
[self presentViewController:_imagePC animated:YES completion:nil];
}
3.代理
读取图片或者视频 统一回调这个代理
系统相册 一次只能选取一张
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info{
[self dismissViewControllerAnimated:YES completion:nil];
NSLog(@"%@", info);
// UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];
// NSData *data = UIImagePNGRepresentation(image);
// NSUInteger byte = data.length/8;
// NSUInteger k = byte / 1024;
// NSUInteger m = k / 1024;
// NSLog(@"%ld", m);计算照片大小
}
//取消按钮被按了
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker{
[self dismissViewControllerAnimated:YES completion:nil];
}
4.将图片保存到系统相册
UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil);