弹出照片选择器

#import "ViewController.h"

@interface ViewController () <UINavigationControllerDelegate, UIImagePickerControllerDelegate>

/**
 *  选择图片
 */
- (IBAction)selectedPhoto;

/**
 *  显示被选中的图片
 */
@property (weak, nonatomic) IBOutlet UIImageView *customIV;

@end

@implementation ViewController

- (IBAction)selectedPhoto
{
    // 1.创建图片选择控制器
    UIImagePickerController *picker = [[UIImagePickerController alloc] init];
    
    // 2.设置代理
    picker.delegate = self;
    
    // 3.判断图库是否能够打开
    if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary]) {
        // 4.设置要打开图库的类型
        picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    }
    
    // 5.弹出照片选择控制器
    [self presentViewController:picker animated:YES completion:nil];
}

#pragma mark - UIImagePickerControllerDelegate
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    /*
    info = {
        UIImagePickerControllerMediaType = "public.image";
        UIImagePickerControllerOriginalImage = "<UIImage: 0x7f8912808270> size {1500, 1001} orientation 0 scale 1.000000";
        UIImagePickerControllerReferenceURL = "assets-library://asset/asset.JPG?id=6E5438ED-9A8C-4ED0-9DEA-AB2D8F8A9360&ext=JPG";
    }
     */
    // 保存被选中的图片
    UIImage *selectedImg = info[UIImagePickerControllerOriginalImage];
    self.customIV.image = selectedImg;
    
    // dismiss图片选择控制器
    [picker dismissViewControllerAnimated:YES completion:nil];
}


@end