UIWindow,UINavigationController与UIViewController之间的关系

UIWindow,UINavigationController与UIViewController之间的关系

虽然每次你都用UINavigationController与UIWindow,但你不一定知道他们之间到底怎么运作的哦:)

AppDelegate.h的代码

RootViewController.m

//
//  RootViewController.m
//  UIWindow
//
//  Copyright (c) 2014年 Y.X. All rights reserved.
//

#import "RootViewController.h"

#define VALUE  1

@interface RootViewController ()

@end

@implementation RootViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    self.view.backgroundColor = [UIColor redColor];

    UITapGestureRecognizer *tap = \
    [[UITapGestureRecognizer alloc] initWithTarget:self
                                            action:@selector(tapEvent:)];

    [self.view addGestureRecognizer:tap];
}

- (void)tapEvent:(UITapGestureRecognizer *)gesture
{
    static int flag = 1;
    if (flag)
    {
        // 初始化3D变换,获取默认值
        CATransform3D perspectiveTransform = CATransform3DIdentity;

        // 缩放变换
        perspectiveTransform = CATransform3DScale(perspectiveTransform, 0.75, 0.75, 0.75);

        [UIView animateWithDuration:0.3 animations:^{
            if (VALUE)
            {
                // 导航控制器的view
                self.navigationController.view.transform = \
                    CATransform3DGetAffineTransform(perspectiveTransform);
            }
            else
            {
                // 自身controller的view
                self.view.transform = CATransform3DGetAffineTransform(perspectiveTransform);
            }
        }];

        flag = 0;
    }
    else
    {
        // 初始化3D变换,获取默认值
        CATransform3D perspectiveTransform = CATransform3DIdentity;

        // 缩放变换
        perspectiveTransform = CATransform3DScale(perspectiveTransform, 1, 1, 1);

        [UIView animateWithDuration:0.3 animations:^{
            if (VALUE)
            {
                // 导航控制器的view
                self.navigationController.view.transform = \
                    CATransform3DGetAffineTransform(perspectiveTransform);
            }
            else
            {
                // 自身controller的view
                self.view.transform = CATransform3DGetAffineTransform(perspectiveTransform);
            }
        }];

        flag = 1;
    }
}

@end

VALUE = 1 的时候与 VALUE = 0 的时候

他们的关系其实非常简单.

UIWindow  ---> UINavigationController  --->  UIViewController,

有时候,我们需要做缩放动画的效果,或者是转场动画的效果,不理解他们之间细微的差距,是没办法处理好的.

他们之间的关系:

知道了这些原理,再写一个侧边栏,实在是太简单了:).