该类继承自UINavigationController类
步骤:
//
// // ViewController.h // Camera // // Created by gao wuhang on 12-11-23. // Copyright (c) 2012年 gao wuhang. All rights reserved. // #import @interface ViewController : UIViewController<</span>UINavigationControllerDelegate, UIImagePickerControllerDelegate> - (IBAction)takePictureButtonClick:(id)sender; - (IBAction)captureVideoButtonClick:(id)sender; @end // // ViewController.m // Camera // // Created by gao wuhang on 12-11-23. // Copyright (c) 2012年 gao wuhang. All rights reserved. // #import "ViewController.h" #import #import @interface ViewController () @end @implementation ViewController - (IBAction)takePictureButtonClick:(id)sender{ //检查相机模式是否可用 if (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) { NSLog(@"sorry, no camera or camera is unavailable."); return; } //获得相机模式下支持的媒体类型 NSArray* availableMediaTypes = [UIImagePickerController availableMediaTypesForSourceType:UIImagePickerControllerSourceTypeCamera]; BOOL canTakePicture = NO; for (NSString* mediaType in availableMediaTypes) { if ([mediaType isEqualToString:(NSString*)kUTTypeImage]) { //支持拍照 canTakePicture = YES; break; } } //检查是否支持拍照 if (!canTakePicture) { NSLog(@"sorry, taking picture is not supported."); return; } //创建图像选取控制器 UIImagePickerController* p_w_picpathPickerController = [[UIImagePickerController alloc] init]; //设置图像选取控制器的来源模式为相机模式 p_w_picpathPickerController.sourceType = UIImagePickerControllerSourceTypeCamera; //设置图像选取控制器的类型为静态图像 p_w_picpathPickerController.mediaTypes = [[[NSArray alloc] initWithObjects:(NSString*)kUTTypeImage, nil] autorelease]; //允许用户进行编辑 p_w_picpathPickerController.allowsEditing = YES; //设置委托对象 p_w_picpathPickerController.delegate = self; //以模视图控制器的形式显示 [self presentModalViewController:p_w_picpathPickerController animated:YES]; [p_w_picpathPickerController release]; } - (IBAction)captureVideoButtonClick:(id)sender{ //检查相机模式是否可用 if (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) { NSLog(@"sorry, no camera or camera is unavailable!!!"); return; } //获得相机模式下支持的媒体类型 NSArray* availableMediaTypes = [UIImagePickerController availableMediaTypesForSourceType:UIImagePickerControllerSourceTypeCamera]; BOOL canTakeVideo = NO; for (NSString* mediaType in availableMediaTypes) { if ([mediaType isEqualToString:(NSString *)kUTTypeImage]) { //支持摄像 canTakeVideo = YES; break; } } //检查是否支持摄像 if (!canTakeVideo) { NSLog(@"sorry, capturing video is not supported.!!!"); return; } //创建图像选取控制器 UIImagePickerController* p_w_picpathPickerController = [[UIImagePickerController alloc] init]; //设置图像选取控制器的来源模式为相机模式 p_w_picpathPickerController.sourceType = UIImagePickerControllerSourceTypeCamera; //设置图像选取控制器的类型为动态图像 p_w_picpathPickerController.mediaTypes = [[[NSArray alloc] initWithObjects:(NSString*)kUTTypeMovie, nil] autorelease]; //设置摄像图像品质 p_w_picpathPickerController.videoQuality = UIImagePickerControllerQualityTypeHigh; //设置最长摄像时间 p_w_picpathPickerController.videoMaximumDuration = 30; //允许用户进行编辑 p_w_picpathPickerController.allowsEditing = YES; //设置委托对象 p_w_picpathPickerController.delegate = self; //以模式视图控制器的形式显示 [self presentModalViewController:p_w_picpathPickerController animated:YES]; [p_w_picpathPickerController release]; } - (void)p_w_picpath:(UIImage*)p_w_picpath didFinishSavingWithError:(NSError*)error contextInfo:(void*)contextInfo{ if (!error) { NSLog(@"picture saved with no error."); } else { NSLog(@"error occured while saving the picture%@", error); } } - (void)p_w_picpathPickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{ //打印出字典中的内容 NSLog(@"get the media info: %@", info); //获取媒体类型 NSString* mediaType = [info objectForKey:UIImagePickerControllerMediaType]; //判断是静态图像还是视频 if ([mediaType isEqualToString:(NSString *)kUTTypeImage]) { //获取用户编辑之后的图像 UIImage* editedImage = [info objectForKey:UIImagePickerControllerEditedImage]; //将该图像保存到媒体库中 UIImageWriteToSavedPhotosAlbum(editedImage, self, @selector(p_w_picpath:didFinishSavingWithError:contextInfo:), NULL); }else if ([mediaType isEqualToString:(NSString *)kUTTypeMovie]) { //获取视频文件的url NSURL* mediaURL = [info objectForKey:UIImagePickerControllerMediaURL]; //创建ALAssetsLibrary对象并将视频保存到媒体库 ALAssetsLibrary* assetsLibrary = [[ALAssetsLibrary alloc] init]; [assetsLibrary writeVideoAtPathToSavedPhotosAlbum:mediaURL completionBlock:^(NSURL *assetURL, NSError *error) { if (!error) { NSLog(@"captured video saved with no error."); }else { NSLog(@"error occured while saving the video:%@", error); } }]; [assetsLibrary release]; } [picker dismissModalViewControllerAnimated:YES]; } - (void)p_w_picpathPickerControllerDidCancel:(UIImagePickerController *)picker{ [picker dismissModalViewControllerAnimated:YES]; } - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. } - (void)viewDidUnload { [super viewDidUnload]; // Release any retained subviews of the main view. } - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown); } @end