无限轮播从入坑到出坑<iOS>

公司项目一期上线了，还有各种问题，最大的问题就是轮播图，需要重新写
今天捣腾了一下午

AppDelegate.m

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    [self setWindow:[[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds]];
    [self.window makeKeyWindow];
    [self.window setRootViewController:[[MainViewController alloc] init]];
    
    return YES;
}

MainViewController 图片

//图片素材名称改得有规律,通过循环体来进行图片的添加

在MainViewController.m

#import "MainViewController.h"

@interface MainViewController ()<UIScrollViewDelegate>

//声明一个属性
@property (nonatomic, strong) UIScrollView *scrollView;
@property (nonatomic, strong) UIPageControl *pageControl;
@property (nonatomic, strong) NSTimer *timer;
@end

@implementation MainViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    [self.view setBackgroundColor:[UIColor whiteColor]];
    
    CGFloat width = CGRectGetWidth(self.view.bounds);
    self.scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 20, width, 420)];
    [self.scrollView setBackgroundColor:[UIColor grayColor]];
    [self.view addSubview:self.scrollView];
    
    //设置滚动区域
    [self.scrollView setContentSize:CGSizeMake(width * 5, 0)];
    //设置分页
    [self.scrollView setPagingEnabled:YES];
    //隐藏水平滚动条
    [self.scrollView setShowsHorizontalScrollIndicator:NO];
    [self.scrollView setDelegate:self];
    
    //设置内容视图
    for (NSInteger i = 0; i < 5; i++) {
        UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(width * i, 0, width, 420)];
        //图片素材名称改得有规律,通过循环体来进行图片的添加 ％d进行占位 索引 i传过来
        [imageView setImage:[UIImage imageNamed:[NSString stringWithFormat:@"ad_0%zd",i]]];
        [self.scrollView addSubview:imageView];
    }
    
    
    
    self.pageControl = [[UIPageControl alloc] initWithFrame:CGRectMake(0, CGRectGetMaxY(self.scrollView.frame)-20, width, 20)];
    [self.pageControl setNumberOfPages:5];
    [self.pageControl setPageIndicatorTintColor:[UIColor blackColor]];
    [self.view addSubview:self.pageControl];
    
    [self initTimer];
}


//封装timer
-(void)initTimer
{
    if (!self.timer) {
        self.timer = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(scrollImage) userInfo:nil repeats:YES];
        //timer设置在哪个线程中
        [[NSRunLoop currentRunLoop] addTimer:self.timer forMode:NSRunLoopCommonModes];
    }


}

//定时器来动态控制滚动视图
-(void)scrollImage
{

    NSInteger currentPage = self.pageControl.currentPage + 1;
    
    if (currentPage >= 5) {
        currentPage = 0;
    }
    
    //偏移量
    [self.scrollView setContentOffset:CGPointMake(currentPage * CGRectGetWidth(self.scrollView.frame),0) animated:YES];

}
//pageControl随着scrollView一起滚动
-(void)scrollViewDidScroll:(UIScrollView *)scrollView
{
    [self.pageControl setCurrentPage:(NSInteger)(scrollView.contentOffset.x / CGRectGetWidth(scrollView.frame))];
}


-(void)scrollViewWillBeginDragging:(UIScrollView *)scrollView
{

    if(self.timer)
{
        //失效
        [self.timer invalidate];
        [self setTimer:nil];
    
    }
}


-(void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate
{

    [self initTimer];

}

告一段落

图片轮播.gif

别问为什么是张予曦，没错我就是西瓜粉，喜欢这个女孩2年了，最近公布恋情了，别拦着我，我去哭一会。

这是Github地址，代码开源了
https://github.com/tb244313/RollingView11
有疑问的私信我.
所以！轮播图会了吗？

下一篇：讲java或者多选图，看心情！