我正在从 ios 设备从本地加载图像，但它没有显示

Question

我想在ios中从本地加载图片，

我在我的文件中添加了这段代码，

NSString *path = [NSString stringWithFormat:@"%@/Documents/Small-mario.png", NSHomeDirectory()];
    NSLog(@"path %@", path);
displayImg.image = [UIImage imageNamed:path];

iget 的路径是，

/Users/WTS-New/Library/Developer/CoreSimulator/Devices/F43C26D2-DCFF-4764-AAF0-F6CC7BCDCF5D/data/Containers/Data/Application/06FE9A96-7705-4FB7-B291-4716CC6679C3/Documents/Small- mario.png

但是图像没有显示在图像视图中。

Answer 1

在您的应用程序中，您无法访问不在您的应用程序包中的图像

你有两个选择：

1. 使用 UIImagePickerController 导入它

2. 将您需要的图像放入您的应用程序包中

Answer 2

请用这个

NSString *path = [NSString stringWithFormat:@"%@/Documents/Small-mario.png", NSHomeDirectory()];
    NSLog(@"path %@", path);
displayImg.image = [UIImage imageWithContentsOfFile:path];

或者你可以使用

 NSURL *destinationURL = [NSURL fileURLWithPath:path];

displayImg.image =[UIImage imageWithData:[NSData dataWithContentsOfURL:destinationURL]]

Answer 3

你可以选择像，

 UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];
imagePickerController.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
imagePickerController.delegate = self;
[self presentViewController:imagePickerController animated:YES completion:nil];

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

UIImage *image = [info valueForKey:UIImagePickerControllerOriginalImage]; // this is your picked image

[picker dismissViewControllerAnimated:YES completion:nil];
}

并确保您确认UIImagePickerControllerDelegate 和UINavigationControllerDelegate。