- (IBAction)click:(id)sender{//创建提醒视图
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"提醒" message:nil preferredStyle:UIAlertControllerStyleActionSheet];UIAlertAction *alertAction = [UIAlertAction actionWithTitle:@"相机" style:UIAlertActionStyleDestructive handler:^(UIAlertAction *action) {//判断设备是否存在摄像头，有就调用系统相机，没有，就提醒用户if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {//创建相机
UIImagePickerController *picker = [[UIImagePickerController alloc] init];//文件由来
picker.sourceType = UIImagePickerControllerSourceTypeCamera; //指定数据来源来自于相机
picker.delegate  = self;// 指定代理
picker.allowsEditing = YES; //允许编辑//模态弹出
[self presentViewController:picker animated:YES completion:nil];}else{//没有摄像头，提醒用户 您的设备没有摄像头
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"您的设备没有摄像头" message:nil preferredStyle:UIAlertControllerStyleAlert];UIAlertAction *alertAction1 = [UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDestructive handler:nil];[alertController addAction:alertAction1];[self presentViewController:alertController animated:YES completion:nil];}}];[alertController addAction:alertAction];UIAlertAction *alertAction2 = [UIAlertAction actionWithTitle:@"相册" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {UIImagePickerController *pickerC = [[UIImagePickerController alloc] init];pickerC.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;//指定数据来源为相册
pickerC.delegate = self;  //指定代理
pickerC.allowsEditing = YES;  // 允许编辑
[self presentViewController:pickerC animated:YES completion:nil];}];[alertController addAction:alertAction2];[self presentViewController:alertController animated:YES completion:nil];}//选取图片之后执行的方法- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{NSLog(@"%@",info);UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];self.photoImage.image = image;[picker dismissViewControllerAnimated:YES completion:nil];}