在.m的- (void)viewDidLoad里建立4Button,Camera调用相机、Library调用图片库、flashlight打开闪光灯、close关闭闪光灯,这里创建Button的代码我就不再写了。
代码如下:
//打开相机
-(void)addCarema
{
//判断是否可以打开相机,模拟器此功能无法使用
if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
UIImagePickerController * picker = [[UIImagePickerController alloc]init];
picker.delegate = self;
picker.allowsEditing = YES; //是否可编辑
//摄像头
picker.sourceType = UIImagePickerControllerSourceTypeCamera;
[self presentModalViewController:picker animated:YES];
[picker release];
}else{
//如果没有提示用户
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error" message:@"你没有摄像头" delegate:nil cancelButtonTitle:@"Drat!" otherButtonTitles:nil];
[alert show];
}
}
打开相机后,然后需要调用UIImagePickerControllerDelegate里的方法,拍摄完成后执行的方法和点击Cancel之后执行的方法:
代码如下:
//拍摄完成后要执行的方法
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
//得到图片
UIImage * image = [info objectForKey:UIImagePickerControllerOriginalImage];
//图片存入相册
UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil);
[self dismissModalViewControllerAnimated:YES];
}
//点击Cancel按钮后执行方法
-(void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
{
[self dismissModalViewControllerAnimated:YES];
}
调用相机照片和保存到图片库已经完成。
接着介绍打开照片库:
代码如下:
-(void)openPicLibrary
{
//相册是可以用模拟器打开的
if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary]) {
UIImagePickerController * picker = [[UIImagePickerController alloc]init];
picker.delegate = self;
picker.allowsEditing = YES;//是否可以编辑
//打开相册选择照片
picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
[self presentModalViewController:picker animated:YES];
[picker release];
}else{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error" message:@"你没有摄像头" delegate:nil cancelButtonTitle:@"Drat!" otherButtonTitles:nil];
[alert show];
}
}
//选中图片进入的代理方法
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(NSDictionary *)editingInfo
{
[self dismissModalViewControllerAnimated:YES];
}
调用闪光灯的代码,由于我也不是很理解,所以没法加注释,但是已经亲测可用,但是调闪光灯时有一个算是bug吧,闪光灯会闲一下,然后再一直亮
(本文来源于图老师网站,更多请访问http://m.tulaoshi.com/bianchengyuyan/)代码如下:
-(void)openFlashlight
{
AVCaptureDevice * device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
if (device.torchMode == AVCaptureTorchModeOff) {
//Create an AV session
AVCaptureSession * session = [[AVCaptureSession alloc]init];
// Create device input and add to current session
AVCaptureDeviceInput * input = [AVCaptureDeviceInput deviceInputWithDevice:device error:nil];
[session addInput:input];
// Create video output and add to current session
AVCaptureVideoDataOutput * output = [[AVCaptureVideoDataOutput alloc]init];
[session addOutput:output];
// Start session configuration
[session beginConfiguration];
[device lockForConfiguration:nil];
// Set torch to on
[device setTorchMode:AVCaptureTorchModeOn];
[device unlockForConfiguration];
[session commitConfiguration];
// Start the session
[session startRunning];
// Keep the session around
[self setAVSession:self.AVSession];
[output release];
}
}
-(void)closeFlashlight
{
[self.AVSession stopRunning];
[self.AVSession release];
}
以上所述就是本文的全部内容了,希望大家能够喜欢。