第一步:设置info,开启权限
@interface ViewController ()<UINavigationControllerDelegate,UIImagePickerControllerDelegate>
@property (weak, nonatomic) IBOutlet UIImageView *imageView;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
}
- (void)touchesBegan:(NSSet*)touches withEvent:(UIEvent *)event{
//1.创建相册选取器
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
//2.设置代理 UIImagePickerController有两个协议：UINavigationControllerDelegate UIImagePickerControllerDelegate (注意:实现完代理方法一定要释放picker)
picker.delegate = self;
//3.设置来源 (注意:相机属性一定要用真机,模拟器不支持)
/** UIImagePickerControllerSourceTypePhotoLibrary,相册 (手机相簿) UIImagePickerControllerSourceTypeCamera,相机（模拟器不支持） UIImagePickerControllerSourceTypeSavedPhotosAlbum，相册（手机照片） */ picker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
//4.允许编辑
picker.allowsEditing = YES;
//5.弹出相册选取器
[self presentViewController:picker animated:YES completion:nil];
}
#pragma mark -UIImagePickerControllerDelegate/**完成选取的两个方法为递进关系 *///2.完成选取 该方法与下面方法1唯一的区别就是将编辑之后的图片image作为参数暴露在外部,而方法二则需要从字典中获取图片
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(nullable NSDictionary*)editingInfo{
[picker dismissViewControllerAnimated:YES completion:nil]; NSLog(@"%@",editingInfo); NSLog(@"%@",image);}
//1.完成选取- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary*)info{
[picker dismissViewControllerAnimated:YES completion:nil];
// info中包括选取的照⽚片,视频的主要信息
// NSString *const UIImagePickerControllerMediaType; 选取的类型 public.image public.movie
// NSString *const UIImagePickerControllerOriginalImage; 修改前 的UIImage object.
// NSString *const UIImagePickerControllerEditedImage; 修改后 的UIImage object.
// NSString *const UIImagePickerControllerCropRect; 原始图 ⽚片的尺⼨寸NSValue object containing a CGRect data type
// NSString *const UIImagePickerControllerMediaURL; 视频在⽂文件系统中 的 NSURL地址
// 保存视 频主要时通过获取其NSURL 然后转换成NSData
UIImage *image = info[UIImagePickerControllerEditedImage];
self.imageView.image = image;
NSLog(@"%@",info);
}
//取消选取
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker{
[picker dismissViewControllerAnimated:YES completion:nil];
}
@end
