IOS相机管理

IOS相机管理

我赢职场IOS相机管理教程：
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 
@interface ViewController : UIViewController
{
      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。

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