iOS 如何启动图像选择器

Question

我有一个 UIButton，当用户点击它时，我想启动图像选择器 Controller

我已经配置了我认为足够的配置，但我不知道我必须传递给该图像选择器以开始工作的消息是什么

这是我的代码

#import "ImagePickerViewController.h"

@interface ImagePickerViewController ()
@property (weak, nonatomic) IBOutlet UIImageView *image;


@end

@implementation ImagePickerViewController


- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.
}
- (IBAction)SelectImage:(id)sender {
    UIImagePickerController *imagePicker = [[UIImagePickerController alloc]init];
    imagePicker.delegate = self;
    imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
}

@end

我已经设置了正确的协议(protocol):

@interface ImagePickerViewController : UIViewController < UINavigationControllerDelegate,UIImagePickerControllerDelegate>

@end

Answer 1

您需要呈现UIImagePicker

- (IBAction)SelectImage:(id)sender
{
    UIImagePickerController *imagePicker = [[UIImagePickerController alloc]init];
    imagePicker.delegate = self;
    imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    [self presentViewController:imagePicker animated:NO completion:nil];
}