[Code Note] Two scroll bars can be slide up and down, and the scroll bar slides

[Code Note] Two scroll bars can be slide up and down, and the scroll bar slides

I ,.

 

 

2. Engineering Drawing.

3. Code.

RootViewController. h

 

#import <UIKit/UIKit.h>@interface RootViewController : UIViewController<UIScrollViewDelegate>{    UIView *backView;    UIScrollView *scrollerViewFirst;    UIScrollView *scrollerViewSecond;    UIImageView * imageViewBook;    UILabel *label;    UIImageView *bigImageView;    UIView *bigView;}@end

 

RootViewController. m

# Import "RootViewController. h "@ interface RootViewController () @ end @ implementation RootViewController-(id) initWithNibName :( NSString *) bundle :( NSBundle *) handle {self = [super initWithNibName: nibNameOrNil bundle: nibBundleOrNil]; if (self) {// Custom initialization} return self;}-(void) viewDidLoad {[super viewDidLoad]; // Do any additional setup after loading the view. [self initBackgroundView] ;}# pragma-mark-funcitons-(void) initBackgroundView {// when you zoom in, bigView = [[UIView alloc] initWithFrame: CGRectMake (10, 10,300,440)]; [self. view addSubview: bigView]; // background image backView = [[UIView alloc] initWithFrame: CGRectMake (0, 0,320,460)]; [self. view addSubview: backView]; // background UIImageView * imageView = [[UIImageView alloc] initWithImage: [UIImage imageNamed: @ "backImage.png"]; imageView. frame = CGRectMake (0, 0,320,460); [backView addSubview: imageView]; // define scrollerViewFirst = [[UIScrollView alloc] initWithFrame: CGRectMake (0, 0,320,151)]; scrollerViewFirst. contentSize = CGSizeMake (320*4,151); scrollerViewFirst. contentOffset = CGPointMake (0, 0); scrollerViewFirst. bounces = YES; scrollerViewFirst. alwaysBounceHorizontal = YES; scrollerViewFirst. showsHorizontalScrollIndicator = NO; scrollerViewFirst. pagingEnabled = YES; scrollerViewFirst. delegate = self; scrollerViewFirst. tag = 1; scrollerViewFirst. backgroundColor = [UIColor redColor]; [backView addSubview: scrollerViewFirst]; // scrollerViewSecond = [[UIScrollView alloc] initWithFrame: CGRectMake (0,152,320,308)]; details. contentSize = CGSizeMake (320*4,308); scrollerViewSecond. contentOffset = CGPointMake (0, 0); scrollerViewSecond. bounces = YES; scrollerViewSecond. alwaysBounceHorizontal = YES; scrollerViewSecond. showsHorizontalScrollIndicator = YES; scrollerViewSecond. delegate = self; scrollerViewSecond. pagingEnabled = YES; scrollerViewSecond. backgroundColor = [UIColor orangeColor]; [backView addSubview: scrollerViewSecond]; // large background image of scrollerFirst (int I = 0; I <4; I ++) {for (int j = 0; j <3; j ++) {UIImageView * imageview = [[UIImageView alloc] initWithImage: [UIImage imageNamed: [NSString stringWithFormat: @ "scrollerFirstTop.png"]; imageview. frame = CGRectMake (0 + I * 320, 0,320,151); [scrollerViewFirst addSubview: imageview] ;}// gallery on the scrollerFirst shelf for (int I = 0; I <12; I ++) {imageViewBook = [[UIImageView alloc] initWithImage: [UIImage imageNamed: [NSString stringWithFormat: @ "d.png", I + 1]; imageViewBook. contentMode = UIViewContentModeScaleToFill; imageViewBook. frame = CGRectMake (10 + I * 106), 22, 80,100); imageViewBook. userInteractionEnabled = YES; imageViewBook. tag = I; optional * tapGesture = [[financialloc] initWithTarget: self action: @ selector (doClickTapGesture :)]; [imageViewBook preview: tapGesture]; [scrollerViewFirst addSubview: imageViewBook];} // Title of scrollerSecond for (int I = 0; I <4; I ++) {UIImageView * topImageView = [[UIImageView alloc] initWithImage: [UIImage imageNamed: @ "scrollerSecondTop"]; topImageView. frame = CGRectMake (100 + 320 * I,-40,220,100); [scrollerViewSecond addSubview: topImageView]; UIImageView * titleImageView = [[UIImageView alloc] initWithImage: [UIImage imageNamed: @ "scrollerSecondTitle.png"]; titleImageView. frame = CGRectMake (3 + 320 * I, 20,100, 55); [scrollerViewSecond addSubview: titleImageView];} // line in each scrollerViewSecond for (int I = 0; I <4; I ++) {for (int j = 0; j <3; j ++) {label = [[UILabel alloc] initWithFrame: CGRectMake (320 * I, 80 + 60 * j, 320, 20)]; if (I = 0) {label. backgroundColor = [UIColor redColor];} else if (I = 1) {label. backgroundColor = [UIColor greenColor];} else if (I = 2) {label. backgroundColor = [UIColor blackColor];} else if (I = 3) {label. backgroundColor = [UIColor blueColor];} [label setFont: [UIFont systemFontOfSize: 12]; label. textAlignment = NSTextAlignmentCenter; label. textColor = [UIColor blueColor]; [scrollerViewSecond addSubview: label] ;}}# pragma-mark-doClickAction-(void) doClickTapGesture :( UITapGestureRecognizer *) tapGesture {NSLog (@ "doClickTapGesture"); // The result of a page being flipped from the right [UIView beginAnimations: nil context: nil]; [UIView setAnimationDuration: 0.7]; [UIView setAnimationTransition: UIViewAnimationTransitionFlipFromLeft forView: self. view cache: YES]; [self. view history: 1 withSubviewAtIndex: 0]; [UIView history]; bigImageView = [[UIImageView alloc] initWithImage: [UIImage imageNamed: [NSString stringWithFormat: @ "languld.png", tapGesture. view. tag + 1]; bigImageView. frame = CGRectMake (0, 0, 300,440); bigImageView. userInteractionEnabled = YES; required * tgrBig = [[financialloc] initWithTarget: self action: @ selector (beginSmall :)]; [bigImageView addGestureRecognizer: tgrBig]; bigView. alpha = 0.2; UIScrollView * scrollerViewThree = [[UIScrollView alloc] initWithFrame: CGRectMake (0, 0,300,440)]; scrollerViewThree. delegate = self; scrollerViewThree. maximumZoomScale = 3.0; scrollerViewThree. vertex = 1; [bigView addSubview: scrollerViewThree]; [scrollerViewThree addSubview: bigImageView];}-(void) beginSmall :( vertex *) sender {NSLog (@ "-- doClickbeginSmall --"); [UIView beginAnimations: nil context: nil]; [UIView setAnimationDuration: 0.7]; [UIView setAnimationTransition: UIViewAnimationTransitionFlipFromLeft forView: self. view cache: YES]; [self. view exchangeSubviewAtIndex: 0 withSubviewAtIndex: 1]; [UIView commitAnimations]; bigView. alpha = 1; [bigImageView removeFromSuperview];}