Cocoa Xcode保存并加载图像

我一直在尝试保存用户选择的图像。这是我的保存代码：

    -(IBAction)save123456 {
        NSUserDefaults *myname = [NSUserDefaults standardUserDefaults];
        [myname setObject:noteview.image forKey:@"name"];

}

    -(IBAction)load123456 {
    NSUserDefaults *myname = [NSUserDefaults standardUserDefaults];
    NSString *tempstring = [myname stringForKey:@"name"];
        noteview.image = tempstring;

}

这似乎是工作，但让我知道，如果我应该改变什么。现在这是我的加载代码

    -(IBAction)save123456 {
        NSUserDefaults *myname = [NSUserDefaults standardUserDefaults];
        [myname setObject:noteview.image forKey:@"name"];

}

    -(IBAction)load123456 {
    NSUserDefaults *myname = [NSUserDefaults standardUserDefaults];
    NSString *tempstring = [myname stringForKey:@"name"];
        noteview.image = tempstring;

}

当我点击加载按钮时，图像就消失了。怎么了

    -(IBAction)save123456 {
        NSUserDefaults *myname = [NSUserDefaults standardUserDefaults];
        [myname setObject:noteview.image forKey:@"name"];

}

    -(IBAction)load123456 {
    NSUserDefaults *myname = [NSUserDefaults standardUserDefaults];
    NSString *tempstring = [myname stringForKey:@"name"];
        noteview.image = tempstring;

}

我通过润色切割连接每件事，这有关系吗

    -(IBAction)save123456 {
        NSUserDefaults *myname = [NSUserDefaults standardUserDefaults];
        [myname setObject:noteview.image forKey:@"name"];

}

    -(IBAction)load123456 {
    NSUserDefaults *myname = [NSUserDefaults standardUserDefaults];
    NSString *tempstring = [myname stringForKey:@"name"];
        noteview.image = tempstring;

}

谢谢

这一行：

    -(IBAction)save123456 {
        NSUserDefaults *myname = [NSUserDefaults standardUserDefaults];
        [myname setObject:noteview.image forKey:@"name"];

}

    -(IBAction)load123456 {
    NSUserDefaults *myname = [NSUserDefaults standardUserDefaults];
    NSString *tempstring = [myname stringForKey:@"name"];
        noteview.image = tempstring;

}

noteview.image = tempstring;

正在将“

NSString

”分配给应该是“

UIImage

”的对象

    -(IBAction)save123456 {
        NSUserDefaults *myname = [NSUserDefaults standardUserDefaults];
        [myname setObject:noteview.image forKey:@"name"];

}

    -(IBAction)load123456 {
    NSUserDefaults *myname = [NSUserDefaults standardUserDefaults];
    NSString *tempstring = [myname stringForKey:@"name"];
        noteview.image = tempstring;

}

编辑：现在我意识到你在做什么

    -(IBAction)save123456 {
        NSUserDefaults *myname = [NSUserDefaults standardUserDefaults];
        [myname setObject:noteview.image forKey:@"name"];

}

    -(IBAction)load123456 {
    NSUserDefaults *myname = [NSUserDefaults standardUserDefaults];
    NSString *tempstring = [myname stringForKey:@"name"];
        noteview.image = tempstring;

}

您需要单独保存文件，然后保存并加载文件路径，或者需要将图像的原始数据（即“

NSData

”）保存并加载到用户默认值

    -(IBAction)save123456 {
        NSUserDefaults *myname = [NSUserDefaults standardUserDefaults];
        [myname setObject:noteview.image forKey:@"name"];

}

    -(IBAction)load123456 {
    NSUserDefaults *myname = [NSUserDefaults standardUserDefaults];
    NSString *tempstring = [myname stringForKey:@"name"];
        noteview.image = tempstring;

}

---

p、 您对变量名的选择令人困惑。使用“myname”而不是“myDefaults”，使用“nameImage”而不是“tempname”（即更具描述性和易懂的内容）。

还需要指出的是，如果这实际上是一个图像，则不能以用户默认值本机存储它。我不确定他是在用iOS还是MacOSX，因为问题的背景不明确。对。。。当我对他的问题做更多的研究时，我意识到一个人无法保存他的图像。。。但是你可以从图像中保存数据。好的，是的，我用的是iOS。好的，我如何使用NSData保存数据。对不起，我是新的t Xcode。非常感谢。

    -(IBAction)save123456 {
        NSUserDefaults *myname = [NSUserDefaults standardUserDefaults];
        [myname setObject:noteview.image forKey:@"name"];

}

    -(IBAction)load123456 {
    NSUserDefaults *myname = [NSUserDefaults standardUserDefaults];
    NSString *tempstring = [myname stringForKey:@"name"];
        noteview.image = tempstring;

}