UIImagePickerController 打开图片库和相机选择图片

ゞ浴缸里的玫瑰 2022-08-02 10:57 132阅读 0赞

** 转载地址； http://blog.csdn.net/cuiweijie3/article/details/8671265**

** 模拟器无法打开视频， 只有图片测试，  打开，选择图片，本地保存，然后下次的时候，先读取本地图片展示。**

//
    //  ViewController.m
    //  Demo_Camer
    //
    //  Created by 麦子 on 15/7/17.
    //  Copyright (c) 2015年 麦子. All rights reserved.
    //
    
    #import "ViewController.h"
    #import "MobileCoreServices/MobileCoreServices.h"
    
    @interface ViewController ()
    
       
    
    
    @end
    
    @implementation ViewController{
        UIImageView* imageView;
        NSString* imagePath;
    
    }
    
    - (void)viewDidLoad {
        [super viewDidLoad];
        
        
        UIImage *image = [UIImage imageNamed:@"1.jpg"];
        imageView = [[UIImageView alloc] init];
        imageView.image = image;
        imageView.frame = CGRectMake(self.view.center.x-200/2, self.view.center.y-200/2, 200, 200);
        imageView.image = image;
        [self corner:imageView];
        [self.view addSubview:imageView];
        
        
        UIButton  *myBtn = [UIButton buttonWithType:UIButtonTypeRoundedRect];
        [myBtn setTitle:@"选择相片" forState:UIControlStateNormal];
        CGFloat btnW = imageView.center.x - 100/2;
        CGFloat btnH = imageView.center.y + imageView.frame.size.height/2 + 50;
        
        myBtn.frame = CGRectMake(btnW, btnH, 100, 50);
        myBtn.backgroundColor = [UIColor orangeColor];
       
        [self.view addSubview:myBtn];
        
        [myBtn addTarget:self action:@selector(myBtn) forControlEvents:UIControlEventTouchUpInside];
        
        
        //获取Documents文件夹目录
        NSArray *path = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
        NSString *documentPath = [path objectAtIndex:0];
        //指定新建文件夹路径
        NSString *imageDocPath = [documentPath stringByAppendingPathComponent:@"ImageFile"];
        //创建ImageFile文件夹
        [[NSFileManager defaultManager] createDirectoryAtPath:imageDocPath withIntermediateDirectories:YES attributes:nil error:nil];
        
        //保存图片的路径
        imagePath = [imageDocPath stringByAppendingPathComponent:@"image.png"];
        
        NSLog(@"图片存储位置------%@",imagePath);
        
    }
    
    -(void)viewWillAppear:(BOOL)animated{
        [super viewWillAppear:YES];
        //根据图片路径载入图片
        UIImage *image=[UIImage imageWithContentsOfFile:imagePath];
        if (image == nil) {
            //显示默认
            imageView.image = [UIImage imageNamed:@"1.jpg"];
        }else {
            //显示保存过的
            imageView.image = image;
        }
    }
    
    - (void)myBtn{
        UIActionSheet *sheet = [[UIActionSheet alloc] initWithTitle:nil delegate:self cancelButtonTitle:@"取消" destructiveButtonTitle:nil otherButtonTitles:@"相册",@"拍照", nil];
        [sheet showInView:self.view];
    }
    
    
    
    - (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex{
    
        switch (buttonIndex) {
            case 0:{
              
                [self localPhoto];
            
            }
                
                break;
            case 1:{
                NSLog(@"拍照");
                [self takeCarmer];
            }
                
                break;
                
            default:
                break;
        }
    
    }
    
    # pragma mark   加载本地图片
    - (void)localPhoto{
    
        UIImagePickerController *imagePicker = [[UIImagePickerController alloc]init];
        // 资源库
        imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
        //
        imagePicker.delegate = self;
        // 设置图片后，可被剪辑
        imagePicker.allowsEditing = YES;
        [self presentViewController:imagePicker animated:true completion:nil];
    }
    
    
    # pragma mark  打开照相机
    - (void)takeCarmer{
        //资源类型为照相机
        UIImagePickerControllerSourceType sourceType = UIImagePickerControllerSourceTypeCamera;
        //判断是否有相机
        if ([UIImagePickerController isSourceTypeAvailable: UIImagePickerControllerSourceTypeCamera]){
            UIImagePickerController *picker = [[UIImagePickerController alloc] init];
            picker.delegate = self;
            //设置拍照后的图片可被编辑
            picker.allowsEditing = YES;
            //资源类型为照相机
            picker.sourceType = sourceType;
             [self presentViewController:picker animated:true completion:nil];
        }else {
            NSLog(@"该设备无摄像头");
        }
    
    }
    
    
    # pragma mark  本地相册，照相，录像回调
    - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{
    
        //通过UIImagePickerControllerMediaType判断返回的是照片还是视频
        NSString *type = [info objectForKey:UIImagePickerControllerMediaType];
        //如果返回的type等于kUTTypeImage，代表返回的是照片,并且需要判断当前相机使用的sourcetype是拍照还是相册
        if ([type isEqualToString: (NSString *)kUTTypeImage]) {
            
            //获取照片的原图
            UIImage* original = [info objectForKey:UIImagePickerControllerOriginalImage];
            //获取图片裁剪的图
            UIImage* edit = [info objectForKey:UIImagePickerControllerEditedImage];
            //获取图片裁剪后，剩下的图
            UIImage* crop = [info objectForKey:UIImagePickerControllerCropRect];
            //获取图片的url
            NSURL* url = [info objectForKey:UIImagePickerControllerMediaURL];
            //获取图片的metadata数据信息
            NSDictionary* metadata = [info objectForKey:UIImagePickerControllerMediaMetadata];
            
            
            if (picker.sourceType == UIImagePickerControllerSourceTypePhotoLibrary) {//本地相册
                NSLog(@"本次相册回调－－%@",metadata);
                
                imageView.image = edit;
                
                
            }else if(picker.sourceType == UIImagePickerControllerSourceTypeCamera){// 照相
                NSLog(@"照相回调");
                
                //如果是拍照的照片，则需要手动保存到本地，系统不会自动保存拍照成功后的照片
                UIImageWriteToSavedPhotosAlbum(edit, self, @selector(image:didFinishSavingWithError:contextInfo:), nil);
            
            }
            
            //以下是保存文件到沙盒路径下
            //把图片转成NSData类型的数据来保存文件
            NSData *data;
            //判断图片是不是png格式的文件
            if (UIImagePNGRepresentation(edit)) {
                //返回为png图像。
                data = UIImagePNGRepresentation(edit);
            }else {
                //返回为JPEG图像。
                data = UIImageJPEGRepresentation(edit, 1.0);
            }
            //保存
            [[NSFileManager defaultManager] createFileAtPath:imagePath contents:data attributes:nil];
            
            [picker dismissViewControllerAnimated:true completion:nil];
        }
        
    }
    
    - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(NSDictionary *)editingInfo{
    
    }
    
    
    
    #pragma mark 设置圆角效果
    
    - (void)corner:(UIView *)view {
        view.layer.cornerRadius = 10;
        view.layer.masksToBounds = YES;
        
    }
    
    - (void)didReceiveMemoryWarning {
        [super didReceiveMemoryWarning];
        // Dispose of any resources that can be recreated.
    }
    
    @end