iOS development manual Chinese version
/ IOS相機管理
IOS相機管理
IOS相機管理
相機簡介
相機是移動設備的共同特點之一,我們能夠使用相機拍攝圖片,并在應用程序里調(diào)用它,而且相機的使用很簡單。
實例步驟
1、創(chuàng)建一個簡單的View based application
2、在ViewController.xib中添加一個button (按鈕),并為該按鈕創(chuàng)建IBAction
3、添加一個 image view (圖像視圖),并創(chuàng)建一個名為imageView的IBOutlet
4、ViewController.h文件代碼如下所示:
#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
運行該應用程序并單擊顯示相機按鈕時,我們就會獲得下面的輸出
只要拍照之后,就可以通過移動和縮放對圖片進行編輯,如下所示。