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的左侧窗格固定为320点。但是我的主视图控制器的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。无论如何都可以吗？

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?

链接到文件，说明固定宽度。

Link to the document which speaks about fixed width.

推荐答案

如果你是UISplitViewController的子类，你可以实现 -viewDidLayoutSubviews 并调整那里的宽度。这是干净的，没有黑客或私有API，甚至可以轮换使用。

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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