ios - 自动布局错误

Question

我遇到了与 this poster 类似的问题.并且我使用了 jrturton 的建议将自定义按钮的代码移动到 viewDidLayoutSubviews 中。在我收到此错误之前，它一直运行良好:

'NSInternalInconsistencyException', reason: 'Auto Layout still required after sending -viewDidLayoutSubviews to the view controller. ViewController's implementation needs to send -layoutSubviews to the view to invoke auto layout.'

我对图形一无所知，我唯一能想到的就是放置 [self.view layoutSubviews]; 但这并没有解决任何问题。当我取消选中 Storyboard 中的“自动布局”时它起作用了，但这改变了我的按钮的尺寸，我想知道是否有另一种方法来修复它？

代码:

-(void)viewDidLayoutSubviews {
    NSArray *arrayOfButtons = [NSArray arrayWithObjects:self.decimalButton, self.buttonOne, self.buttonTwo, self.buttonThree, nil];

    for (UIButton *button in arrayOfButtons) {

        [button setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
        [button setTitleColor:[UIColor redColor] forState:UIControlStateHighlighted];

        button.layer.borderWidth = 0.25f;
        button.layer.borderColor = [[UIColor grayColor] CGColor];

        CAGradientLayer *btnGradient = [CAGradientLayer layer];
        btnGradient.frame = button.bounds;
        btnGradient.colors = [NSArray arrayWithObjects:
                              (id)[[UIColor colorWithRed:122.0f / 255.0f green:188.0f / 255.0f blue:255.0f / 255.0f alpha:1.0f] CGColor],
                              (id)[[UIColor colorWithRed:96.0f / 255.0f green:171.0f / 255.0f blue:248.0f / 255.0f alpha:1.0f] CGColor],
                              nil];
        [button.layer insertSublayer:btnGradient atIndex:0];
    }
}

Answer 1

我最近遇到了这个问题，当时我想通过提供 viewDidLayoutSubviews 消息处理程序以编程方式调整 Storyboard创建的 View 的框架。按照异常消息的说明，我尝试在 -viewDidLayoutSubviews 的末尾添加 [self.view layoutIfNeeded]，然后成功了。