#import <UIKit/UIKit.h>

//头文件

#import "MoreView.h"

@interface RootViewController : UIViewController

{

    //是否点击

    BOOL isSwitch;

    //红色UIView界面

    MoreView *moreView;

}

@end

//点击任何处，显示出红色的UIView

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event

{

    if (isSwitch) {

        [moreView removeFromSuperview];

        isSwitch=NO;

    }else{

        moreView=[[MoreView alloc]initWithFrame:CGRectMake(10, 100, 200, 50)];

        [self.view addSubview:moreView];

        isSwitch=YES;

    }

}

#import <UIKit/UIKit.h>

@interface MoreView : UIView

@end

#import "MoreView.h"

@implementation MoreView

- (id)initWithFrame:(CGRect)frame

{

    self = [super initWithFrame:frame];

    if (self) {

        // Initialization code

        //设计背景色为红色

        self.backgroundColor=[UIColor redColor];

    }

    return self;

}

@end