11.camera
Gold Challenge
问题：利用UIImagePickerController 中cameraOverlayView属性。使其在取景视图的正中显示一个十字。
代码如下：
//添加照片
-
(IBAction)takePicture:(id)sender {
UIImagePickerController *imagePicker =
[[UIImagePickerController alloc] init];//如果设备支持相机，就使用拍照模式
//否则让用户从照片库中选择照片
if ([UIImagePickerController
isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
imagePicker.showsCameraControls = YES;
//相机十字显示
UIView *crosshair = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 60, 60)];
crosshair.backgroundColor = [UIColor clearColor];
//横线
UIView *line1=[[UIView alloc]initWithFrame:CGRectMake(0, 29.5, 60, 1)];
line1.backgroundColor=[UIColor whiteColor];
[crosshair addSubview:line1];
//竖线
UIView *line2=[[UIView alloc]initWithFrame:CGRectMake(29.5, 0, 1, 60)];
line2.backgroundColor=[UIColor whiteColor];
[crosshair addSubview:line2];crosshair.center = self.view.center; imagePicker.cameraOverlayView = crosshair;}else{
imagePicker.sourceType =
UIImagePickerControllerSourceTypePhotoLibrary;}
//可编辑
imagePicker.allowsEditing = YES;imagePicker.delegate = self;
//以模态的形式显示UIImagePickerController对象
[self presentViewController:imagePicker animated:YES completion:nil];
}
