ios学习--获取通过UIImagePackerController获取的系统相册 图片&视频 的名称信息

获取相册图片信息
本文介绍如何使用IUImagePickerController从iOS系统相册中选取图片,并详细展示了如何通过ALAssetsLibrary等API获取选中图片的具体信息,包括文件名等。

首先,先了解以下内容:

   

通过IUImagePickerController方法获取系统的相册,而想要得到从系统相册得到的图片的信息需要以下几步:

1:获得从UIImagePicker选择的照片的Assert;

2:得到Assert的ALAssertRepresentation;

3:ALAssertRepresentation有个filename的属性




代码如下:该引入的库一定要引入


#import "ViewController.h"


#import <AssetsLibrary/AssetsLibrary.h>  // 必须导入

#import <AssetsLibrary/ALAsset.h>



#import <AssetsLibrary/ALAssetsGroup.h>


#import <AssetsLibrary/ALAssetRepresentation.h>



@interface ViewController ()

@end


@implementation ViewController


- (void)viewDidLoad {

    [super viewDidLoad];

    // Do any additional setup after loading the view, typically from a nib.

    [self.view setBackgroundColor:[UIColor whiteColor]];

    

    UIButton *uploadDemandButton = [[UIButton alloc]init];

    [uploadDemandButton setFrame:CGRectMake(50, 50, 100, 50)];

    [uploadDemandButton setTitle:@"哈哈" forState:UIControlStateNormal];

    [uploadDemandButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];

    [uploadDemandButton addTarget:self action:@selector(handleUploadDemand:) forControlEvents:UIControlEventTouchUpInside];

    [self.view addSubview:uploadDemandButton];

    

   

    

    

    

    

}


- (void)handleUploadDemand:(id)sender{

    UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];

    imagePicker.delegate = self;

    imagePicker.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;

    imagePicker.allowsEditing = YES;

    

    

    imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;

    imagePicker.mediaTypes = @[(NSString *)kUTTypeMovie,(NSString *)kUTTypeImage];

    [self presentViewController:imagePicker animated:YES completion:nil];

}



-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{

    NSLog(@"ishiodfhoisahdfiis");

    NSString *mediaType=[info objectForKey:UIImagePickerControllerMediaType];

    if ([mediaType isEqualToString:(NSString *)kUTTypeImage]){

//        //如果是图片


        

    }else{

        //如果是视频

        NSURL *url = info[UIImagePickerControllerReferenceURL];


        

        

        

        ALAssetsLibraryAssetForURLResultBlock resultblock = ^(ALAsset *myasset)

        

        {

            

            ALAssetRepresentation *representation = [myasset defaultRepresentation];

            

            NSString *fileName = [representation filename];

            

            NSLog(@"fileName : %@",fileName);

            

        };

        

        

        

        ALAssetsLibrary* assetslibrary = [[ALAssetsLibrary alloc] init];

        

        [assetslibrary assetForURL:url

         

                       resultBlock:resultblock 

         

                      failureBlock:nil];

        

        

    }

    

    [picker dismissModalViewControllerAnimated:YES];

}



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