在 UISplitViewController 中更改 Master 的宽度 [英] Change the width of Master in UISplitViewController

问题描述

iPad 编程指南说 splitView 的左窗格固定为 320 点.但是我的主视图控制器 320 像素太多了.我想减少它并为详细视图控制器提供更多空间.反正有可能吗?

The iPad programming guide says that the splitView's left pane is fixed to 320 points. But 320 pixels for my master view controller is too much. I would like to reduce it and give more space to detail view controller. Is it possible by anyway?

链接到 文档 谈到固定宽度.

Link to the document which speaks about fixed width.

推荐答案

如果你继承 UISplitViewController，你可以实现 -viewDidLayoutSubviews 并调整那里的宽度.这很干净，没有黑客或私有 API，甚至可以使用轮换.

If you subclass UISplitViewController, you can implement -viewDidLayoutSubviews and adjust the width there. This is clean, no hacks or private APIs, and works even with rotation.

- (void)viewDidLayoutSubviews
{
    const CGFloat kMasterViewWidth = 240.0;

    UIViewController *masterViewController = [self.viewControllers objectAtIndex:0];
    UIViewController *detailViewController = [self.viewControllers objectAtIndex:1];

    if (detailViewController.view.frame.origin.x > 0.0) {
        // Adjust the width of the master view
        CGRect masterViewFrame = masterViewController.view.frame;
        CGFloat deltaX = masterViewFrame.size.width - kMasterViewWidth;
        masterViewFrame.size.width -= deltaX;
        masterViewController.view.frame = masterViewFrame;

        // Adjust the width of the detail view
        CGRect detailViewFrame = detailViewController.view.frame;
        detailViewFrame.origin.x -= deltaX;
        detailViewFrame.size.width += deltaX;
        detailViewController.view.frame = detailViewFrame;

        [masterViewController.view setNeedsLayout];
        [detailViewController.view setNeedsLayout];
    }
}

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