IOS 7 Study - Manipulating a Navigation Controller’s Array of View

Swift导航控制器视图控制器操作

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于 2019-06-27 00:37:21 发布

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原文链接：http://www.cnblogs.com/davidgu/p/3557309.html

本文介绍如何在Swift中直接操作与特定导航控制器关联的视图控制器数组，包括访问和修改视图控制器堆栈，提供了具体的代码示例，如移除最后一个视图控制器并带动画返回。

Problem
You would like to directly manipulate the array of view controllers associated with a
specific navigation controller

Solution
Use the viewControllers property of the UINavigationController class to access and
modify the array of view controllers associated with a navigation controller

- (void) goBack {
    /* Get the current array of View Controllers */
    NSArray *currentControllers = self.navigationController.viewControllers;

    /* Create a mutable array out of this array */
    NSMutableArray *newControllers = [NSMutableArray
                                      arrayWithArray:currentControllers];

    /* Remove the last object from the array */
    [newControllers removeLastObject];

    /* Assign this array to the Navigation Controller with animation */
    [self.navigationController setViewControllers:newControllers
        animated:YES];
}