基于OC的相册访问问题

最新推荐文章于 2019-12-24 15:15:09 发布

原创最新推荐文章于 2019-12-24 15:15:09 发布 · 923 阅读

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这篇博客探讨了在iOS应用中访问相册时，如何在info.plist文件中配置必要的权限，确保用户隐私合规。

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相册访问

访问相册需要在info.plist 配置一个权限

    NSPhotoLibraryUsageDescription

//
//  获取相册权限.m
//  OC知识点整理
//
//  Created by li on 17/2/26.
//  Copyright © 2017年 李文强. All rights reserved.
//

#import "获取相册权限.h"

@interface ______ ()<UINavigationControllerDelegate,UIImagePickerControllerDelegate>

@property (nonatomic, strong)UIImageView *myHeadPortrait;


@end

@implementation ______

/*
        访问相册需要在info.plist 配置一个权限

        NSPhotoLibraryUsageDescription

 */


- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    self.myHeadPortrait = [[UIImageView alloc]initWithFrame:CGRectMake(100, 100, 100, 100)];
    _myHeadPortrait.backgroundColor = [UIColor magentaColor];
    [self.view addSubview:self.myHeadPortrait];
    [self setHeadPortrait];
}



#pragma mark 设置头像样式
-(void)setHeadPortrait{
    //  把头像设置成圆形
    self.myHeadPortrait.layer.cornerRadius=self.myHeadPortrait.frame.size.width/2;
    self.myHeadPortrait.layer.masksToBounds=YES;
    //  给头像加一个圆形边框
    self.myHeadPortrait.layer.borderWidth = 1.5f;
    self.myHeadPortrait.layer.borderColor = [UIColor blackColor].CGColor;

    /**
     *  添加手势：也就是当用户点击头像了之后，对这个操作进行反应
     */
    //允许用户交互
    _myHeadPortrait.userInteractionEnabled = YES;

    //初始化一个手势
    UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc]initWithTarget:self
                                                                               action:@selector(alterHeadPortrait:)];

    //给imageView添加手势
    [_myHeadPortrait addGestureRecognizer:singleTap];
}

#pragma mark 添加提示框，并设置点击事件
-(void)alterHeadPortrait:(UITapGestureRecognizer *)gesture{
    /**
     *  弹出提示框
     */
    //初始化提示框
    UIAlertController *alert = [UIAlertController alertControllerWithTitle:nil message:nil preferredStyle:UIAlertControllerStyleActionSheet];
    //按钮：从相册选择，类型：UIAlertActionStyleDefault
    [alert addAction:[UIAlertAction actionWithTitle:@"从相册选择" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {


        //初始化UIImagePickerController
        UIImagePickerController *PickerImage = [[UIImagePickerController alloc]init];
        //获取方式1：通过相册（呈现全部相册），UIImagePickerControllerSourceTypePhotoLibrary
        //获取方式2，通过相机，UIImagePickerControllerSourceTypeCamera
        //获取方法3，通过相册（呈现全部图片），UIImagePickerControllerSourceTypeSavedPhotosAlbum
        PickerImage.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
        //允许编辑，即放大裁剪
        PickerImage.allowsEditing = YES;
        //自代理
        PickerImage.delegate = self;
        //页面跳转
        [self presentViewController:PickerImage animated:YES completion:nil];

    }]];

    //按钮：拍照，类型：UIAlertActionStyleDefault
    [alert addAction:[UIAlertAction actionWithTitle:@"拍照" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action){
        /**
         其实和从相册选择一样，只是获取方式不同，前面是通过相册，而现在，我们要通过相机的方式
         */
        if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeSavedPhotosAlbum]){
            UIImagePickerController *PickerImage = [[UIImagePickerController alloc]init];
            //获取方式:通过相机
            PickerImage.sourceType = UIImagePickerControllerSourceTypeCamera;
            PickerImage.allowsEditing = YES;
            PickerImage.delegate = self;
            [self presentViewController:PickerImage animated:YES completion:nil];
        }
    }]];
    //按钮：取消，类型：UIAlertActionStyleCancel
    [alert addAction:[UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:nil]];
    [self presentViewController:alert animated:YES completion:nil];
}



#pragma mark 设置代理方法，对获取的图片进行处理
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info{
    //定义一个newPhoto，用来存放我们选择的图片。
    UIImage *newPhoto = [info objectForKey:@"UIImagePickerControllerEditedImage"];
    _myHeadPortrait.image = newPhoto;
    [self dismissViewControllerAnimated:YES completion:nil];
}
｝