iOS打开照相机与本地相册选择图片

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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

[objc]  view plain copy  
 #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：

[objc]  view plain copy  
 //  
 //  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  