UIImagePickerController拍照与摄像
//
// ViewController.h
// Camera
//
// Created by gao wuhang on 12-11-23.
// Copyright (c) 2012年 gaowuhang. 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 gaowuhang. All rights reserved.
//
#import "ViewController.h"
#import
#import
@interface ViewController()
@end
@implementationViewController
- (IBAction)takePictureButtonClick:(id)sender{
//检查相机模式是否可用
if(![UIImagePickerControllerisSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]){
NSLog(@"sorry, no camera or camera isunavailable.");
return;
}
//获得相机模式下支持的媒体类型
NSArray*availableMediaTypes = [UIImagePickerControlleravailableMediaTypesForSourceType:UIImagePickerControllerSourceTypeCamera];
BOOL canTakePicture = NO;
for (NSString* mediaTypein 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 notsupported.");
return;
}
//创建图像选取控制器
UIImagePickerController* imagePickerController =[[UIImagePickerControlleralloc]init];
//设置图像选取控制器的来源模式为相机模式
imagePickerController.sourceType=UIImagePickerControllerSourceTypeCamera;
//设置图像选取控制器的类型为静态图像
imagePickerController.mediaTypes = [[[NSArrayalloc] initWithObjects:(NSString*)kUTTypeImage,nil] autorelease];
//允许用户进行编辑
imagePickerController.allowsEditing =YES;
//设置委托对象
imagePickerController.delegate=self;
//以模视图控制器的形式显示
[selfpresentModalViewController:imagePickerController animated:YES];
[imagePickerControllerrelease];
}
- (IBAction)captureVideoButtonClick:(id)sender{
//检查相机模式是否可用
if(![UIImagePickerControllerisSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]){
NSLog(@"sorry, no camera or camera isunavailable!!!");
return;
}
//获得相机模式下支持的媒体类型
NSArray*availableMediaTypes = [UIImagePickerControlleravailableMediaTypesForSourceType:UIImagePickerControllerSourceTypeCamera];
BOOL canTakeVideo = NO;
for (NSString* mediaTypein 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 notsupported.!!!");
return;
}
//创建图像选取控制器
UIImagePickerController* imagePickerController =[[UIImagePickerControlleralloc]init];
//设置图像选取控制器的来源模式为相机模式
imagePickerController.sourceType=UIImagePickerControllerSourceTypeCamera;
//设置图像选取控制器的类型为动态图像
imagePickerController.mediaTypes = [[[NSArrayalloc] initWithObjects:(NSString*)kUTTypeMovie,nil] autorelease];
//设置摄像图像品质
imagePickerController.videoQuality=UIImagePickerControllerQualityTypeHigh;
//设置最长摄像时间
imagePickerController.videoMaximumDuration =30;
//允许用户进行编辑
imagePickerController.allowsEditing =YES;
//设置委托对象
imagePickerController.delegate=self;
//以模式视图控制器的形式显示
[selfpresentModalViewController:imagePickerController animated:YES];
[imagePickerControllerrelease];
}
- (void)image:(UIImage*)imagedidFinishSavingWithError:(NSError*)error contextInfo:(void*)contextInfo{
if (!error) {
NSLog(@"picture saved with noerror.");
}
else
{
NSLog(@"error occured while saving thepicture%@", error);
}
}
- (void)imagePickerController:(UIImagePickerController *)pickerdidFinishPickingMediaWithInfo:(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 = [infoobjectForKey: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 = [infoobjectForKey:UIImagePickerControllerEditedImage];
//将该图像保存到媒体库中
UIImageWriteToSavedPhotosAlbum(editedImage,self,@selector(image:didFinishSavingWithError:contextInfo:),NULL);
}elseif([mediaType isEqualToString:(NSString *)kUTTypeMovie])
{
//获取视频文件的url
NSURL* mediaURL = [infoobjectForKey:UIImagePickerControllerMediaURL];
//创建ALAssetsLibrary对象并将视频保存到媒体库
ALAssetsLibrary* assetsLibrary= [[ALAssetsLibraryalloc]init];
[assetsLibrarywriteVideoAtPathToSavedPhotosAlbum:mediaURLcompletionBlock:^(NSURL *assetURL,NSError *error) {
if (!error) {
NSLog(@"captured video saved with noerror.");
}else
{
NSLog(@"erroroccured while saving the video:%@", error);
}
}];
[assetsLibraryrelease];
}
[pickerdismissModalViewControllerAnimated:YES];
}
- (void)imagePickerControllerDidCancel:(UIImagePickerController*)picker{
[picker dismissModalViewControllerAnimated:YES];
}
- (void)viewDidLoad
{
[superviewDidLoad];
// Do any additional setup after loading the view, typically from anib.
}
- (void)viewDidUnload
{
[superviewDidUnload];
// Release any retained subviews of themain view.
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return(interfaceOrientation !=UIInterfaceOrientationPortraitUpsideDown);
}
@end