iOS中的图像转换器

我正在尝试让我的应用程序从3个屏幕进行基本的背景更改。这是我的.h文件

#import <UIKit/UIKit.h>

@class BIDYellowViewController;
@class BIDBlueViewController;
@class BIDGreenViewController;

@interface BIDSwitchViewController : UIViewController

@property (strong, nonatomic) BIDYellowViewController *yellowViewController;
@property (strong, nonatomic) BIDBlueViewController *blueViewController;
@property (strong, nonatomic) BIDGreenViewController *greenViewController;

- (IBAction)switchViews:(id)sender;


@end

---

我遇到的问题是，在第一个循环中，它重复绿色屏幕两次，然后继续正常工作。我是否遗漏了什么，或者我应该使用switch:case语句（如果是，我将如何执行）？

如果要连续重复，则使用全局计数变量作为

static int count=0;

并将代码用作：

- (IBAction)switchViews:(id)sender
{
    [UIView beginAnimations:@"View Flip" context:nil];
    [UIView setAnimationDuration:1.25];
    [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
    [UIView setAnimationTransition:UIViewAnimationTransitionFlipFromRight forView:self.view cache:YES];

    switch (count) {
        case 0:

            [greenView removeFromSuperview];
            [blueView removeFromSuperview];

            [self.view addSubview:yellowView];
            break;
        case 1:

            [yellowView removeFromSuperview];
            [greenView removeFromSuperview];

            [self.view addSubview:blueView];

            break;
        case 2:

            [blueView removeFromSuperview];
            [yellowView removeFromSuperview];

            [self.view addSubview:greenView];

            break;

    }

    count++;

    if (count==3) {
        count=0;
    }

    [UIView commitAnimations];
}

您还可以将三个xib与单个ViewController一起使用，只需将xib的类更改为您希望这样使用的ViewController的类---

---

如果您有viewControllers，那么为什么要使用addSubView？或简单使用UIView不需要使用三个viewControllers您的意思是要重复它？或停止重复它我需要它重复。按下按钮时，它会旋转到“黄色”；再按一次，它会旋转为绿色；再次按下它，它会旋转到蓝色；再按一次，它会变成黄色，……等等……我对iOS/Xcode很陌生，不知道在哪里插入你的建议？我需要将它设置为每种颜色都有一个我已经创建的.h和.m文件。你的一些建议会在那些文件里吗？任何更详细的帮助都将不胜感激。是的，这是我给你的重复代码检查我的回答如果你不知道代码放在哪里，那么请保持代码原样，并使用我在SwitchView方法中使用的计数和切换

- (IBAction)switchViews:(id)sender
{
    [UIView beginAnimations:@"View Flip" context:nil];
    [UIView setAnimationDuration:1.25];
    [UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
    [UIView setAnimationTransition:UIViewAnimationTransitionFlipFromRight forView:self.view cache:YES];

    switch (count) {
        case 0:

            [greenView removeFromSuperview];
            [blueView removeFromSuperview];

            [self.view addSubview:yellowView];
            break;
        case 1:

            [yellowView removeFromSuperview];
            [greenView removeFromSuperview];

            [self.view addSubview:blueView];

            break;
        case 2:

            [blueView removeFromSuperview];
            [yellowView removeFromSuperview];

            [self.view addSubview:greenView];

            break;

    }

    count++;

    if (count==3) {
        count=0;
    }

    [UIView commitAnimations];
}

BIDViewController *yellowViewController;
BIDViewController *blueViewController;
BIDViewController *greenViewController;


self.yellowViewController = [[BIDViewController alloc]initWithNibName:@"YellowView" bundle:nil];
self.greenViewController = [[BIDViewController alloc] initWithNibName:@"GreenView" bundle:nil];
self.blueViewController = [[BIDViewController alloc] initWithNibName:@"BlueView" bundle:nil];