IOS打开照相机与本地相册选择图片实例详解

2020-07-26 02:47:19

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IOS打开照相机与本地相册选择图片

最近正好项目里面要集成“打开照相机与本地相册选择图片”的功能，今天就在这边给大家写一个演示程序；打开相机拍摄后或者在相册中选择一张照片，然后将它显示在界面上。好了废话不多说，因为比较简单直接上源码。

首先，我们在头文件中添加需要用到的actionSheet控件，显示图片的UIImageView控件，并且加上所需要的协议

#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

通过点击我设置在界面中的按钮来呼出actionSheet控件，来选择相应的操作拍照或是在相册中选择相片，代码如下：

// // 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. }   /**  @ 调用ActionSheet  */ - (void)callActionSheetFunc{   if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]){     self.actionSheet = [[UIActionSheet alloc] initWithTitle:@"选择图像" delegate:self cancelButtonTitle:@"取消" destructiveButtonTitle:nil otherButtonTitles:@"拍照", @"从相册选择", nil nil];   }else{     self.actionSheet = [[UIActionSheet alloc] initWithTitle:@"选择图像" delegate:self cancelButtonTitle:@"取消"destructiveButtonTitle:nil otherButtonTitles:@"从相册选择", 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;     // 判断是否支持相机     if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {       switch (buttonIndex) {         case 0:           //来源:相机           sourceType = UIImagePickerControllerSourceTypeCamera;           break;         case 1:           //来源:相册           sourceType = UIImagePickerControllerSourceTypePhotoLibrary;           break;         case 2:           return;       }     }     else {       if (buttonIndex == 2) {         return;       } else {         sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;       }     }     // 跳转到相机或相册页面     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

代码比较简单，也容易理解，运行的效果如下：