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];
    }else{
        self.actionSheet = [[UIActionSheet alloc] initWithTitle:@"选择图像" delegate:self cancelButtonTitle:@"取消"destructiveButtonTitle:nil otherButtonTitles:@"从相册选择", 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：