Question

我将UIImage存储在NSDictionary中，然后将NSDictionary传递到应用中的其他位置。 gridImages是NSMutableArray

NSDictionary *pageDict = [pageArray objectAtIndex:0];

UIImage *pageImage = [pageDict objectForKey:@"image"];

[gridImages addObject:pageImage];

pagedict返回

{
    class = is;
    image = "<UIImage: 0x14e20e10>";
    name = kaka;
    page = 64;
}

这可能是我做的

UIImage *pageImage = [pageDict objectForKey:@"image"];

但是，当我尝试将UIImage添加到数组时，我收到此错误：

-[UIImage stringByDeletingPathExtension]: unrecognized selector sent to instance 0x14e20e10

有什么想法吗？

编辑：

对于NSDictionary，我尝试将UIImage存储为NSData：

NSData *imageData = UIImagePNGRepresentation(textbookImage);
    [pageDict setObject:imageData forKey:@"image"];
    [pageDict setObject:textbookName forKey:@"name"];
    [pageDict setObject:page forKey:@"page"];
    [pageDict setObject:nameOfClass forKey:@"class"];

解析它是这样的：

  NSData *imageData = [pageDict objectForKey:@"image"];
   UIImage *pageImage = [UIImage imageWithData:imageData];

但它仍然会返回相同的错误

Answer 1

您无法将UIImage设置为NSUserDefaults，因为UIImage是非属性列表对象。

您最好从文档目录存储图像路径。

此代码将有所帮助。

// SET Image

NSString *strImagePath = //path of image from documents directory

NSMutableDictionary *dictOne = [NSMutableDictionary dictionaryWithCapacity:0];

[dictOne setObject:strImagePath forKey:@"image"];

[[NSUserDefaults standardUserDefaults] setObject:dictOne forKey:@"dict"];

//获取图片

 NSMutableDictionary *dict = [[NSUserDefaults standardUserDefaults] objectForKey:@"dict"];

    UIImage *image = [UIImage imageWithContentsOfFile:[dict objectForKey@"image"]];

修改

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSString *strImageFileName = [documentsDirectory stringByAppendingPathComponent:@"yourImageFileName"]; UIImage *image = // Your image; NSData *dataImage = UIImageJPEGRepresentation(image, 0.5f); /* Good image quality NSData *dataImage = UIImagePNGRepresentation(image); */ [dataImage writeToFile:strImageFileName atomically:YES];

快乐的编码。

将UIImage添加到数组时无法识别的选择器错误

1 个答案: