IOS相机管理

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

camera_Output1

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。

camera_Output2

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