IOS相机管理

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相机简介

相机是移动设备的共同特点之一，我们能够使用相机拍摄图片，并在应用程序里调用它，而且相机的使用很简单。

实例步骤

1、创建一个简单的View based application

2、在ViewController.xib中添加一个button （按钮），并为该按钮创建IBAction

3、添加一个 image view （图像视图），并创建一个名为imageView的IBOutlet

4、ViewController.h文件代码如下所示：

#import <UIKit/UIKit.h>



@interface ViewController : UIViewController<UIImagePickerControllerDelegate>

{   

   UIImagePickerController *imagePicker;

   IBOutlet UIImageView *imageView;    

}

- (IBAction)showCamera:(id)sender;



@end

5、修改ViewController.m,如下所示：

#import "ViewController.h"



@interface ViewController ()



@end



@implementation ViewController



- (void)viewDidLoad

{

    [super viewDidLoad];    

}



- (void)didReceiveMemoryWarning

{

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}



- (IBAction)showCamera:(id)sender {

    imagePicker.allowsEditing = YES;

    if ([UIImagePickerController isSourceTypeAvailable:

        UIImagePickerControllerSourceTypeCamera])

    {

        imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;

    }

    else{

        imagePicker.sourceType = 

        UIImagePickerControllerSourceTypePhotoLibrary;

    }

    [self presentModalViewController:imagePicker animated:YES];



}

-(void)imagePickerController:(UIImagePickerController *)picker 

  didFinishPickingMediaWithInfo:(NSDictionary *)info{

    UIImage *image = [info objectForKey:UIImagePickerControllerEditedImage];

    if (image == nil) {    

        image = [info objectForKey:UIImagePickerControllerOriginalImage];

    }

    imageView.image = image;

    

}



-(void)imagePickerControllerDidCancel:(UIImagePickerController *)picker{

    [self dismissModalViewControllerAnimated:YES];

}



@end

输出

运行该应用程序并单击显示相机按钮时，我们就会获得下面的输出

只要拍照之后，就可以通过移动和缩放对图片进行编辑，如下所示。