相关疑难解决方法(0)

我正在尝试以编程方式在UIStackView中添加视图.现在我的代码是:

UIView *view1 = [[UIView alloc]init];
view1.backgroundColor = [UIColor blackColor];
[view1 setFrame:CGRectMake(0, 0, 100, 100)];

UIView *view2 =  [[UIView alloc]init];
view2.backgroundColor = [UIColor greenColor];
[view2 setFrame:CGRectMake(0, 100, 100, 100)];

[self.stack1 addArrangedSubview:view1];
[self.stack1 addArrangedSubview:view2];

当我部署应用程序时,只有一个视图,它是黑色的.(view1也获取view2的参数)