UIScrollView 中具有多个笔尖的未声明视图

Question

我试图使用 3 个笔尖在同一个 UIScrollView 中渲染 3 个不同的视图。但是 xcode 不断返回视图未声明的错误。

- (void)loadView {
    [super loadView];
    UIScrollView *scroll = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];
    scroll.pagingEnabled = YES;
    NSInteger numberOfViews = 3;


    MainWindow.view.frame = CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height);
    [scroll addSubview:MainWindow.view];
    view2.view.frame = CGRectMake(self.view.frame.size.width, 0, self.view.frame.size.width, self.view.frame.size.height);
    [scroll addSubview:view2.view];
    view3.view.frame = CGRectMake(self.view.frame.size.width*2, 0, self.view.frame.size.width, self.view.frame.size.height);
    [scroll addSubview:view3.view];

    scroll.contentSize = CGSizeMake(self.view.frame.size.width * numberOfViews, self.view.frame.size.height);
    [self.view addSubview:scroll];
    [scroll release];
}

在此示例中，Xcode 会说 MainWindow、view2 和 view 3 未声明。我做错了什么？

Answer 1

来声明一个对象

NSObject *object

通过“您可能希望做什么

UIView *view2 = ...

来声明和定义 view2”