UIImagePickerController

UIImagePickerController

在创建imagePickerController时，可选择allowEditing = YES;
在添加alertController 和 alertAction 时，要记得先判断设备是否允许使用相机
通过
if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])
来判断

1、图片选择完成后会执行此方法

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info {          //通过UIImagePickerControllerOriginalImage可获取选择的图片          UIImage *image = info[UIImagePickerControllerOriginalImage];}2、在选择图片时点击取消会执行此方法- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {//点击右上角cancel会执行}