设置头部代理
<UINavigationControllerDelegate, UIImagePickerControllerDelegate>
1.调用相机
检测前置摄像头是否可用
- (BOOL)isFrontCameraAvailable{
return [UIImagePickerController isCameraDeviceAvailable:UIImagePickerControllerCameraDeviceFront];
}
检测后置摄像头是否可用
- (BOOL)isRearCameraAvailable{
return [UIImagePickerController isCameraDeviceAvailable:UIImagePickerControllerCameraDeviceRear];
}
调用相机
///调用相机
- (void)persentImagePicker{
if (!_imagePickerG) {
///初始化相机
_imagePickerG = [[UIImagePickerController alloc]init];
///代理
_imagePickerG.delegate = self;
} // 前面的摄像头是否可用
if ([self isFrontCameraAvailable]) {
_imagePickerG.sourceType = UIImagePickerControllerSourceTypeCamera;
}
// 后面的摄像头是否可用
else if ([self isFirstResponder]){
_imagePickerG.sourceType = UIImagePickerControllerSourceTypeCamera;
}
else{
[SVProgressHUD showErrorWithStatus:@"没有相机可用~"];
return;
}
///允许拍照后裁剪
_imagePickerG.allowsEditing = YES;
[self.navigationController presentViewController:_imagePickerG animated:YES completion:nil];
}
2.调用相册
///调用本地相册
- (void)persentImagePicker{
if (!_imagePickerG) {
///初始化相机
_imagePickerG = [[UIImagePickerController alloc]init];
///代理
_imagePickerG.delegate = self;
}
///相册
_imagePickerG.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
_imagePickerG.allowsEditing = YES;
[self.navigationController presentViewController:_imagePickerG animated:YES completion:nil];
}
3.代理事件
///取消选择图片（拍照）
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker{
[picker dismissViewControllerAnimated:YES completion:nil];
}
///选择图片完成（从相册或者拍照完成）
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info{
UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];///原图
//获取修剪后的图片
UIImage *imageUp = [info objectForKey:UIImagePickerControllerEditedImage];
}
4.将图片保存到本地
///保存图片到本地相册
-(void)imageTopicSave:(UIImage *)image{
UIImageWriteToSavedPhotosAlbum(image, self, @selector(image: didFinishSavingWithError: contextInfo:), nil);
}
- (void)image:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo{
if (error == nil) { }
else{
///图片未能保存到本地
}
}