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這篇文章將為大家詳細(xì)講解有關(guān)iOS基于UIScrollView如何實(shí)現(xiàn)滑動(dòng)引導(dǎo)頁,小編覺得挺實(shí)用的,因此分享給大家做個(gè)參考,希望大家閱讀完這篇文章后可以有所收獲。
效果圖:
WelcomeViewController.h
#import <UIKit/UIKit.h> @interface WelcomeViewController : UIViewController @end
WelcomeViewController.m
#import "WelcomeViewController.h" #define IMAGECOUNT 3 @interface WelcomeViewController () <UIScrollViewDelegate> @property (nonatomic, strong)UIPageControl *pageControl; @end @implementation WelcomeViewController - (void)viewDidLoad { [super viewDidLoad]; //創(chuàng)建ScrollView UIScrollView *sv = [[UIScrollView alloc] init]; sv.frame = self.view.bounds; //設(shè)置邊緣不彈跳 sv.bounces = NO; //整頁滾動(dòng) sv.pagingEnabled = YES; sv.showsHorizontalScrollIndicator = NO; //加入多個(gè)子視圖(ImageView) for(NSInteger i=0; i<IMAGECOUNT; i++){ NSString *imgName = [NSString stringWithFormat:@"%ld", i+1]; UIImage *image = [UIImage imageNamed:imgName]; UIImageView *imageView = [[UIImageView alloc]initWithImage:image]; CGRect frame = CGRectZero; frame.origin.x = i * sv.frame.size.width; frame.size = sv.frame.size; imageView.frame = frame; [sv addSubview:imageView]; if(i==IMAGECOUNT-1){ //開啟圖片的用戶點(diǎn)擊功能 imageView.userInteractionEnabled = YES; //加個(gè)按鈕 UIButton *button = [[UIButton alloc]init]; button.frame = CGRectMake((imageView.frame.size.width-150)/2, imageView.frame.size.height*0.8, 150, 40); button.backgroundColor = [UIColor orangeColor]; [button setTitle:@"立即體驗(yàn)" forState:UIControlStateNormal]; button.titleLabel.font = [UIFont boldSystemFontOfSize:16]; [imageView addSubview:button]; [button addTarget:self action:@selector(enter) forControlEvents:UIControlEventTouchUpInside]; } } sv.contentSize = CGSizeMake(IMAGECOUNT * sv.frame.size.width, sv.frame.size.height); [self.view addSubview:sv]; //加入頁面指示控件PageControl UIPageControl *pageControl = [[UIPageControl alloc]init]; self.pageControl = pageControl; //設(shè)置frame pageControl.frame = CGRectMake(0, self.view.frame.size.height - 40, self.view.frame.size.width, 20); //分頁面的數(shù)量 pageControl.numberOfPages = IMAGECOUNT; //設(shè)置小圓點(diǎn)渲染顏色 pageControl.pageIndicatorTintColor = [UIColor whiteColor]; //設(shè)置當(dāng)前選中小圓點(diǎn)的渲染顏色 pageControl.currentPageIndicatorTintColor = [UIColor redColor]; //關(guān)閉用戶點(diǎn)擊交互 pageControl.userInteractionEnabled = NO; [self.view addSubview:pageControl]; sv.delegate = self; } - (void)enter { NSLog(@"進(jìn)入應(yīng)用"); } //UIScrollViewDelegate方法 - (void)scrollViewDidScroll:(UIScrollView *)scrollView { CGPoint offset = scrollView.contentOffset; if(offset.x<=0){ offset.x = 0; scrollView.contentOffset = offset; } NSUInteger index = round(offset.x / scrollView.frame.size.width); self.pageControl.currentPage = index; } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } @end
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