IOS打开照相机与本地相册选择图片实例详解

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！