- (IBAction)chooseImage:(id)sender {
// 创建UIImagePickerController实例
UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];
// 设置代理
imagePickerController.delegate = self;
// 是否允许编辑（默认为NO）
imagePickerController.allowsEditing = YES;
// 创建一个警告控制器
UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"选取图片" message:nil preferredStyle:UIAlertControllerStyleActionSheet];
// 设置警告响应事件
UIAlertAction *cameraAction = [UIAlertAction actionWithTitle:@"拍照" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
// 设置照片来源为相机
imagePickerController.sourceType = UIImagePickerControllerSourceTypeCamera;
// 设置进入相机时使用前置或后置摄像头
imagePickerController.cameraDevice = UIImagePickerControllerCameraDeviceFront;
// 展示选取照片控制器
[self presentViewController:imagePickerController animated:YES completion:^{}];
}];
UIAlertAction *photosAction = [UIAlertAction actionWithTitle:@"从相册选择" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
imagePickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
[self presentViewController:imagePickerController animated:YES completion:^{}];
}];
UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
}];
// 判断是否支持相机
if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])
{
// 添加警告按钮
[alert addAction:cameraAction];
}
[alert addAction:photosAction];
[alert addAction:cancelAction];
// 展示警告控制器
[self presentViewController:alert animated:YES completion:nil];
}