iOS - 视图转换

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  使用视图转换

  视图转换是在另一个视图上添加一个具有适当转换动画效果的视图的有效方法。

  更新 ViewController.xib 如下 -

  

  为在 xib 中创建的按钮创建操作。
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  更新 ViewController.h

  在 ViewController 类中声明两个视图实例。这ViewController.h 创建操作后，文件将如下所示 -

  
  #import <UIKit/UIKit.h>
  @interface ViewController : UIViewController {
     UIView *view1;
     UIView *view2;
  }
  -(IBAction)flipFromLeft:(id)sender;
  -(IBAction)flipFromRight:(id)sender;
  -(IBAction)flipFromTop:(id)sender;
  -(IBAction)flipFromBottom:(id)sender;
  -(IBAction)curlUp:(id)sender;
  -(IBAction)curlDown:(id)sender;
  -(IBAction)dissolve:(id)sender;
  -(IBAction)noTransition:(id)sender;
  @end
  

  复制
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  更新 ViewController.m

  我们将添加一个自定义方法 setUpView初始化视图。我们还创建了另一种方法doTransitionWithType: 这创造了从 view1 到 view2或相反亦然。然后我们将实现我们之前创建的操作方法，并使用转换类型调用 doTransitionWithType: 方法。更新的ViewController.m 如下 -

  
  #import "ViewController.h"
  @interface ViewController ()
  @end
  @implementation ViewController
  - (void)viewDidLoad {
     [super viewDidLoad];
     [self setUpView];
     // Do any additional setup after loading the view, typically from a nib.
  }
  -(void)setUpView {
     view1 = [[UIView alloc]initWithFrame:self.view.frame];
     view1.backgroundColor = [UIColor lightTextColor];
     view2 = [[UIView alloc]initWithFrame:self.view.frame];
     view2.backgroundColor = [UIColor orangeColor];
     [self.view addSubview:view1];
     [self.view sendSubviewToBack:view1];
  }
  -(void)doTransitionWithType:(UIViewAnimationTransition)animationTransitionType {
     if ([[self.view subviews] containsObject:view2 ]) {
        [UIView transitionFromView:view2
        toView:view1
        duration:2
        options:animationTransitionType
        completion:^(BOOL finished) {
           [view2 removeFromSuperview];
        }];
        [self.view addSubview:view1];
        [self.view sendSubviewToBack:view1];
     } else {
        [UIView transitionFromView:view1
        toView:view2
        duration:2
        options:animationTransitionType
        completion:^(BOOL finished) {
           [view1 removeFromSuperview];
        }];
        [self.view addSubview:view2];
        [self.view sendSubviewToBack:view2];
     }
  }
  -(IBAction)flipFromLeft:(id)sender {
     [self doTransitionWithType:UIViewAnimationOptionTransitionFlipFromLeft];
  }
  -(IBAction)flipFromRight:(id)sender {
     [self doTransitionWithType:UIViewAnimationOptionTransitionFlipFromRight];
  }
  -(IBAction)flipFromTop:(id)sender {
     [self doTransitionWithType:UIViewAnimationOptionTransitionFlipFromTop];
  }
  -(IBAction)flipFromBottom:(id)sender {
     [self doTransitionWithType:UIViewAnimationOptionTransitionFlipFromBottom];
  }
  -(IBAction)curlUp:(id)sender {
     [self doTransitionWithType:UIViewAnimationOptionTransitionCurlUp];
  }
  -(IBAction)curlDown:(id)sender {
     [self doTransitionWithType:UIViewAnimationOptionTransitionCurlDown];
  }
  -(IBAction)dissolve:(id)sender {
     [self doTransitionWithType:UIViewAnimationOptionTransitionCrossDissolve];
  }
  -(IBAction)noTransition:(id)sender{
     [self doTransitionWithType:UIViewAnimationOptionTransitionNone];
  }
  - (void)didReceiveMemoryWarning {
     [super didReceiveMemoryWarning];
     // Dispose of any resources that can be recreated.
  }
  @end
  

  复制
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  输出

  当我们运行应用程序时，我们将获得以下输出 -

  

  您可以选择不同的按钮来查看转换的工作原理。在选择卷曲时，过渡将如下 -