IOS打開照相機與本地相冊選擇圖片實例詳解

2020-07-26 02:47:19

字體：大中小

來源：轉載

供稿：網友

IOS打開照相機與本地相冊選擇圖片

最近正好項目里面要集成“打開照相機與本地相冊選擇圖片”的功能，今天就在這邊給大家寫一個演示程序；打開相機拍攝后或者在相冊中選擇一張照片，然后將它顯示在界面上。好了廢話不多說，因為比較簡單直接上源碼。

首先，我們在頭文件中添加需要用到的actionSheet控件，顯示圖片的UIImageView控件，并且加上所需要的協議

#import <UIKit/UIKit.h>  @interface ImagePickerViewController : UIViewController<UIImagePickerControllerDelegate,UIActionSheetDelegate,UINavigationControllerDelegate>  @property (strong, nonatomic) IBOutlet UIImageView *headImage;  @property (strong, nonatomic) UIActionSheet *actionSheet;  - (IBAction)clickPickImage:(id)sender; @end

通過點擊我設置在界面中的按鈕來呼出actionSheet控件，來選擇相應的操作拍照或是在相冊中選擇相片，代碼如下：

// // ImagePickerViewController.m // testAuto // // Created by silicon on 15/5/9. // Copyright (c) 2015年 silicon. All rights reserved. //  #import "ImagePickerViewController.h"  @interface ImagePickerViewController ()  @end  @implementation ImagePickerViewController  @synthesize actionSheet = _actionSheet;  - (void)viewDidLoad {   [super viewDidLoad];   // Do any additional setup after loading the view from its nib.    }  - (void)didReceiveMemoryWarning {   [super didReceiveMemoryWarning];   // Dispose of any resources that can be recreated. }   /**  @ 調用ActionSheet  */ - (void)callActionSheetFunc{   if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]){     self.actionSheet = [[UIActionSheet alloc] initWithTitle:@"選擇圖像" delegate:self cancelButtonTitle:@"取消" destructiveButtonTitle:nil otherButtonTitles:@"拍照", @"從相冊選擇", nil nil];   }else{     self.actionSheet = [[UIActionSheet alloc] initWithTitle:@"選擇圖像" delegate:self cancelButtonTitle:@"取消"destructiveButtonTitle:nil otherButtonTitles:@"從相冊選擇", nil nil];   }      self.actionSheet.tag = 1000;   [self.actionSheet showInView:self.view]; }  // Called when a button is clicked. The view will be automatically dismissed after this call returns - (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex{   if (actionSheet.tag == 1000) {     NSUInteger sourceType = UIImagePickerControllerSourceTypePhotoLibrary;     // 判斷是否支持相機     if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {       switch (buttonIndex) {         case 0:           //來源:相機           sourceType = UIImagePickerControllerSourceTypeCamera;           break;         case 1:           //來源:相冊           sourceType = UIImagePickerControllerSourceTypePhotoLibrary;           break;         case 2:           return;       }     }     else {       if (buttonIndex == 2) {         return;       } else {         sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;       }     }     // 跳轉到相機或相冊頁面     UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];     imagePickerController.delegate = self;     imagePickerController.allowsEditing = YES;     imagePickerController.sourceType = sourceType;          [self presentViewController:imagePickerController animated:YES completion:^{          }];   } }  - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {   [picker dismissViewControllerAnimated:YES completion:^{      }];      UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];   self.headImage.image = image; }  /* #pragma mark - Navigation  // In a storyboard-based application, you will often want to do a little preparation before navigation - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {   // Get the new view controller using [segue destinationViewController].   // Pass the selected object to the new view controller. } */  - (IBAction)clickPickImage:(id)sender {      [self callActionSheetFunc]; } @end

代碼比較簡單，也容易理解，運行的效果如下：