IOS相機管理


IOS相機管理


相機簡介

相機是行動裝置的共同特點之一,我們能夠使用相機拍攝圖片,並在應用程式中呼叫它,而且相機的使用很簡單。

實例步驟

1、建立一個簡單的View based application

2、在ViewController.xib中新增一個button (按鈕),並為該按鈕建立IBAction

3、新增一個image view (圖片視圖),並建立一個名為imageView的IBOutlet

4、ViewController.h檔案程式碼如下所示:

#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

輸出

運行該應用程式並點擊顯示相機按鈕時,我們就會得到下面的輸出

camera_Output1

只要拍照後,就可以透過移動和縮放對圖片進行編輯,如下所示。

camera_Output2

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