IOS打开照相机与本地相册选择图片实例详解_网络技术

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：

感谢阅读，希望能帮助到大家，谢谢大家对本站的支持！

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