ios - 图片没有保存，即使我得到确认

Question

它是这样工作的，所以如果有人有类似的问题，你可以这样做

所以这是我在 applicationdidfinishlaunching 中输入的内容

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

 }

这是我写的

(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(归档)一个未初始化的变量。变量 yourUIImage 已声明，但您从未为其分配任何内容。然后你尝试存档它。如果你幸运的话，yourUIImage 只是 nil，但如果你不走运，它会因为未初始化的垃圾指针而崩溃。