iOS中调用相机以及相册

有时候需要在程序中调用系统的相机以及手机相册,接下来简要介绍调用的方法:

//.h文件

@interface CameraViewController : UIViewController<UIImagePickerControllerDelegate,UINavigationControllerDelegate>@property (nonatomic,retain)UIImageView *imageView;//@property (nonatomic,retain)UIImagePickerController *imageController;//图片控制器@end

</pre><p></p><p>这个时候可以给UIImageView进行初始化,然后初始化两个Button,分别是调用相机和调用相册</p><p></p><p></p><pre name="code" class="objc">    self.imageView = [[UIImageView alloc] initWithFrame:CGRectMake(100, 64, 200, 200)];    _imageView.backgroundColor = [UIColor grayColor];    [self.view addSubview:_imageView];

    UIButton *button1 = [UIButton buttonWithType:UIButtonTypeSystem];    button1.frame = CGRectMake(20, 400, 80, 50);    [button1 setTitle:@"照相机" forState:UIControlStateNormal];    [button1 addTarget:self action:@selector(enterCramera:) forControlEvents:UIControlEventTouchUpInside];    [self.view addSubview:button1];    UIButton *button2 = [UIButton buttonWithType:UIButtonTypeSystem];    button2.frame = CGRectMake(150, 400, 100, 50);    [button2 setTitle:@"图库" forState:UIControlStateNormal];    [button2 addTarget:self action:@selector(enterPhotos:) forControlEvents:UIControlEventTouchUpInside];    [self.view addSubview:button2];

实现两个Button的方法

//打开相机- (void)enterCramera:(UIButton*)button{    //如果设备里面没有相机    if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {        //创建一个图片选择器        self.imageController = [[UIImagePickerController alloc] init];        self.imageView = UIImagePickerControllerSourceTypePhotoLibrary;        _imageController.delegate = self;        _imageController.allowsEditing = NO;        [self presentViewController:_imageController animated:YES completion:nil];            }else{        UIAlertView *alertV = [[UIAlertView alloc] initWithTitle:@"提示" message:@"该设备不支持相机功能" delegate:nil cancelButtonTitle:@"确定" otherButtonTitles:nil];        //[self.view addSubview:alertV];        [alertV show];    }    }

//打开相册- (void)enterPhotos:(UIButton*)button{    //创建一个图片选择器    self.imageController = [[UIImagePickerController alloc]init];    //指定图片来源    _imageController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;//从现有的照片库取照片    _imageController.delegate = self;    _imageController.allowsEditing = YES;//设置为yes时,取出图片后会对图片进行放大或缩小以及移动位置    [self presentViewController:_imageController animated:YES completion:nil];    }

这时候就实现了对相机以及相册的调用;

imagePickControllerDelegate代理方法可以帮助我们实现更加丰富的功能

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(NSDictionary *)editingInfo NS_DEPRECATED_IOS(2_0, 3_0);- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info;- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker;

//UINavigationControllerDelegate代理方法

<span style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 13px; line-height: 20px;">//当一个viewController要显示的时候通知一下外面，给我们一个机会进行设置，包含如下两个函数：</span>

<span style="font-family: Arial, Helvetica, sans-serif;">- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated;</span>

<span style="font-family: Arial, Helvetica, sans-serif;">- (void)navigationController:(UINavigationController *)navigationController didShowViewController:(UIViewController *)viewController animated:(BOOL)animated;</span>

<span style="font-family: Arial, Helvetica, sans-serif;">- (NSUInteger)navigationControllerSupportedInterfaceOrientations:(UINavigationController *)navigationController NS_AVAILABLE_IOS(7_0);</span>

<span style="font-family: Arial, Helvetica, sans-serif;">- (UIInterfaceOrientation)navigationControllerPreferredInterfaceOrientationForPresentation:(UINavigationController *)navigationController NS_AVAILABLE_IOS(7_0);</span>

<span style="font-family: Arial, Helvetica, sans-serif;">- (id <UIViewControllerInteractiveTransitioning>)navigationController:(UINavigationController *)navigationController</span>

                          interactionControllerForAnimationController:(id <UIViewControllerAnimatedTransitioning>) animationController NS_AVAILABLE_IOS(7_0);

- (id <UIViewControllerAnimatedTransitioning>)navigationController:(UINavigationController *)navigationController                                   animationControllerForOperation:(UINavigationControllerOperation)operation                                                fromViewController:(UIViewController *)fromVC                                                  toViewController:(UIViewController *)toVC  NS_AVAILABLE_IOS(7_0);