Question

我尝试使用UIImages对数组进行编码。

然后我称之为“保存”功能

NSString *filePath = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0] stringByAppendingPathComponent:@"SavedUserData"];
[NSKeyedArchiver archiveRootObject: self toFile:filePath];

我的行例外 [encoder encodeObject:recipePhotoList forKey:@"recipePhotoList"]; //带图像的数组

 -[UIImage encodeWithCoder:]: unrecognized selector sent to instance 0x1b1380
2012-03-23 11:59:43.694 fishmarket[261:1a0f] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UIImage encodeWithCoder:]: unrecognized selector sent to instance 0x1b1380'

在5+ iOS上它完美运行，在4.3我有这个问题。

Answer 1

这是因为UIImage在iOS 5之前不支持NSCoding。检查iOS 5.0 API diff.

Answer 2

用于iOS的编码/解码UIIMage的替代方案＆lt; 5.0

+ (void)saveImage:(UIImage*)image withName:(NSString*)imageName
{
    if (image != nil)
    {
        NSArray* paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
        NSString* documentsDirectory = [paths objectAtIndex:0];
        NSString* path = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithString:imageName]];
        NSData* data = UIImagePNGRepresentation(image);
        [data writeToFile:path atomically:YES];
    }
}

+ (UIImage*)loadImageNamed:(NSString*)imageName
{
    NSArray* paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString* documentsDirectory = [paths objectAtIndex:0];
    NSString* path = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithString:imageName]];
    UIImage* image = [UIImage imageWithContentsOfFile:path];
    return image;
}

希望能帮到别人。

编码图像数组异常

2 个答案: