Question

就像这样，所以如果遇到类似问题的人，你就可以这样做

所以这就是我在applicationdidfinishlaunching中放入的内容

if ([[NSUserDefaults standardUserDefaults] objectForKey:@"image"] == nil) { 
picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
[self presentModalViewController:picker animated:YES];

 }

这是我在

中写的内容

(void)imagePickerController:(UIImagePickerController *) Picker didFinishPickingMediaWithInfo:(NSDictionary *)info {

NSData *imageData;
UIImage *yourUIImage;
imageData = [NSKeyedArchiver archivedDataWithRootObject:yourUIImage];
[[NSUserDefaults standardUserDefaults] setObject:imageData forKey:@"image"];
yourUIImage = [info objectForKey:UIImagePickerControllerOriginalImage];
[self dismissModalViewControllerAnimated:YES];}

Answer 1

您正在序列化（存档）未初始化的变量。变量yourUIImage已声明，但您从不为其分配任何内容。然后你尝试存档它。如果你很幸运，yourUIImage只是nil，但是如果你运气不好会因为整齐的垃圾指针而崩溃。

Answer 2

这可能听起来很愚蠢，但你在设置对象后调用了[[NSUserDefaults standardUserDefaults] synchronize]吗？

即使我收到确认，图像也无法保存

2 个答案: