ios - 如何使用NSKeyedArchiver在iOS中复制按钮

要复制按钮，此方法工作正常：

   NSData *archivedData = [NSKeyedArchiver archivedDataWithRootObject: btn];
   UIButton *newButton = [NSKeyedUnarchiver unarchiveObjectWithData: archivedData];

但是，自iOS12开始，此功能已被弃用。但是使用建议的方法会使newButton为nil。我在做什么错了，或者确实有另一种方法可以复制UIButton。完整代码：

// Init originalBtnsArray and
originalBtnsArray = [[NSMutableArray alloc]init];

// Populate originalBtnsArray
for (UIButton *btn in btnsReferencesArray){
    // Below works but is now deprecated as of iOS 12
    //NSData *archivedData = [NSKeyedArchiver archivedDataWithRootObject: btn];
    //UIButton *newButton = [NSKeyedUnarchiver unarchiveObjectWithData: archivedData];

    NSError* error = nil;
    NSData *archivedData = [NSKeyedArchiver archivedDataWithRootObject:btn requiringSecureCoding:NO error:&error];

    NSError* unArchiveError = nil;
    UIButton *newButton = [NSKeyedUnarchiver unarchivedObjectOfClass:[UIButton class] fromData:archivedData error:&unArchiveError];

    // newButton is nil, which is suboptimal
    [originalBtnsArray addObject:newButton];
}

最佳答案

现在可以正常工作了：

UIButton *newButton = [[UIButton alloc]init];
newButton.frame = btn.frame;
[originalBtnsArray addObject:newButton];