iOS 轮播图
其实这个东西吧，往上有很多，也都很简单，我自己也写过不少，但是感觉效果都不是很好，总是有一些卡顿，然后就写篇文章来说一个不卡的吧！废话有点多，大佬不喜勿喷
直接上代码
pod导入pod 'SDCycleScrollView'这个pod非常有用，不会的建议你学一下，这个真的非常有用pod SDWebImage这个足够了
#import "ViewController.h"
#import "SDCycleScrollView.h"
#import "UIImageView+WebCache.h"
@interface ViewController () <SDCycleScrollViewDelegate>
@end
@implementation ViewController
{
NSArray*_imagesURLStrings;
SDCycleScrollView*_customCellScrollViewDemo;
}
- (void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor = [UIColor colorWithRed:0.98 green:0.98 blue:0.98 alpha:0.99];
UIImageView *backgroundView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"005.jpg"]];
backgroundView.frame=self.view.bounds;
[self.viewaddSubview:backgroundView];
UIScrollView *demoContainerView = [[UIScrollView alloc] initWithFrame:self.view.frame];
demoContainerView.contentSize = CGSizeMake(self.view.frame.size.width, 1200);
[self.viewaddSubview:demoContainerView];
self.title=@"轮播Demo";
// 情景一：采用本地图片实现
NSArray*imageNames =@[@"h1.jpg",
@"h2.jpg",
@"h3.jpg",
@"h4.jpg",
@"h7"// 本地图片请填写全名
];
// 情景二：采用网络图片实现
NSArray*imagesURLStrings =@[
@"https://ss2.baidu.com/-vo3dSag_xI4khGko9WTAnF6hhy/super/whfpf%3D425%2C260%2C50/sign=a4b3d7085dee3d6d2293d48b252b5910/0e2442a7d933c89524cd5cd4d51373f0830200ea.jpg",
@"https://ss0.baidu.com/-Po3dSag_xI4khGko9WTAnF6hhy/super/whfpf%3D425%2C260%2C50/sign=a41eb338dd33c895a62bcb3bb72e47c2/5fdf8db1cb134954a2192ccb524e9258d1094a1e.jpg",
@"http://c.hiphotos.baidu.com/image/w%3D400/sign=c2318ff84334970a4773112fa5c8d1c0/b7fd5266d0160924c1fae5ccd60735fae7cd340d.jpg"
];
_imagesURLStrings= imagesURLStrings;
// 情景三：图片配文字
NSArray *titles = @[@"新建交流QQ群：185534916 我看看好使不的一天天的我实施压力测试",
@"disableScrollGesture可以设置禁止拖动",
@"感谢您的支持，如果下载的",
@"如果代码在使用过程中出现问题",
@"您可以发邮件到gsdios@126.com"
];
CGFloat w = self.view.bounds.size.width;
// >>>>>>>>>>>>>>>>>>>>>>>>> demo轮播图1 >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
// 本地加载 --- 创建不带标题的图片轮播器
SDCycleScrollView *cycleScrollView = [SDCycleScrollView cycleScrollViewWithFrame:CGRectMake(0, 64, w, 180) shouldInfiniteLoop:YES imageNamesGroup:imageNames];
cycleScrollView.delegate=self;
cycleScrollView.pageControlStyle = SDCycleScrollViewPageContolStyleAnimated;
[demoContainerViewaddSubview:cycleScrollView];
cycleScrollView.scrollDirection = UICollectionViewScrollDirectionVertical;
// --- 轮播时间间隔，默认1.0秒，可自定义
//cycleScrollView.autoScrollTimeInterval = 4.0;
// >>>>>>>>>>>>>>>>>>>>>>>>> demo轮播图2 >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
// 网络加载 --- 创建带标题的图片轮播器
SDCycleScrollView *cycleScrollView2 = [SDCycleScrollView cycleScrollViewWithFrame:CGRectMake(0, 280, w, 180) delegate:self placeholderImage:[UIImage imageNamed:@"placeholder"]];
cycleScrollView2.pageControlAliment = SDCycleScrollViewPageContolAlimentRight;
cycleScrollView2.titlesGroup= titles;
cycleScrollView2.currentPageDotColor= [UIColorwhiteColor];// 自定义分页控件小圆标颜色
[demoContainerViewaddSubview:cycleScrollView2];
// --- 模拟加载延迟
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.3 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
cycleScrollView2.imageURLStringsGroup= imagesURLStrings;
});
// block监听点击方式
cycleScrollView2.clickItemOperationBlock= ^(NSIntegerindex) {
NSLog(@">>>>> %ld", (long)index);
};
// >>>>>>>>>>>>>>>>>>>>>>>>> demo轮播图3 >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
// 网络加载 --- 创建自定义图片的pageControlDot的图片轮播器
SDCycleScrollView *cycleScrollView3 = [SDCycleScrollView cycleScrollViewWithFrame:CGRectMake(0, 500, w, 180) delegate:self placeholderImage:[UIImage imageNamed:@"placeholder"]];
cycleScrollView3.currentPageDotImage= [UIImageimageNamed:@"pageControlCurrentDot"];
cycleScrollView3.pageDotImage= [UIImageimageNamed:@"pageControlDot"];
cycleScrollView3.imageURLStringsGroup= imagesURLStrings;
[demoContainerViewaddSubview:cycleScrollView3];
// >>>>>>>>>>>>>>>>>>>>>>>>> demo轮播图4 >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
// 网络加载 --- 创建只上下滚动展示文字的轮播器
// 由于模拟器的渲染问题，如果发现轮播时有一条线不必处理，模拟器放大到100%或者真机调试是不会出现那条线的
SDCycleScrollView *cycleScrollView4 = [SDCycleScrollView cycleScrollViewWithFrame:CGRectMake(0, 750, w, 40) delegate:self placeholderImage:nil];
cycleScrollView4.scrollDirection = UICollectionViewScrollDirectionVertical;
cycleScrollView4.onlyDisplayText=YES;
NSMutableArray *titlesArray = [NSMutableArray new];
[titlesArrayaddObject:@"纯文字上下滚动轮播"];
[titlesArrayaddObject:@"纯文字上下滚动轮播 -- demo轮播图4"];
[titlesArrayaddObjectsFromArray:titles];
cycleScrollView4.titlesGroup= [titlesArraycopy];
[cycleScrollView4disableScrollGesture];
[demoContainerViewaddSubview:cycleScrollView4];
// >>>>>>>>>>>>>>>>>>>>>>>>> demo轮播图5 自定义cell的轮播图 >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
// 如果要实现自定义cell的轮播图，必须先实现customCollectionViewCellClassForCycleScrollView:和setupCustomCell:forIndex:代理方法
_customCellScrollViewDemo = [SDCycleScrollView cycleScrollViewWithFrame:CGRectMake(0, 820, w, 120) delegate:self placeholderImage:[UIImage imageNamed:@"placeholder"]];
_customCellScrollViewDemo.currentPageDotImage = [UIImage imageNamed:@"pageControlCurrentDot"];
_customCellScrollViewDemo.pageDotImage = [UIImage imageNamed:@"pageControlDot"];
_customCellScrollViewDemo.imageURLStringsGroup = imagesURLStrings;
[demoContainerViewaddSubview:_customCellScrollViewDemo];
}
- (void)viewWillAppear:(BOOL)animated
{
[superviewWillAppear:animated];
// 如果你发现你的CycleScrollview会在viewWillAppear时图片卡在中间位置，你可以调用此方法调整图片位置
// [你的CycleScrollview adjustWhenControllerViewWillAppera];
}
#pragma mark - SDCycleScrollViewDelegate
- (void)cycleScrollView:(SDCycleScrollView *)cycleScrollView didSelectItemAtIndex:(NSInteger)index
{
NSLog(@"---点击了第%ld张图片", (long)index);
[self.navigationController pushViewController:[NSClassFromString(@"DemoVCWithXib") new] animated:YES];
}
// 滚动到第几张图回调
- (void)cycleScrollView:(SDCycleScrollView*)cycleScrollViewdidScrollToIndex:(NSInteger)index
{
NSLog(@">>>>>> 滚动到第%ld张图", (long)index);
}
// 不需要自定义轮播cell的请忽略下面的代理方法
// 如果要实现自定义cell的轮播图，必须先实现customCollectionViewCellClassForCycleScrollView:和setupCustomCell:forIndex:代理方法
- (Class)customCollectionViewCellClassForCycleScrollView:(SDCycleScrollView *)view
{
if (view != _customCellScrollViewDemo) {
returnnil;
}
return [CustomCollectionViewCell class];
}
- (void)setupCustomCell:(UICollectionViewCell *)cell forIndex:(NSInteger)index cycleScrollView:(SDCycleScrollView *)view
{
CustomCollectionViewCell *myCell = (CustomCollectionViewCell *)cell;
[myCell.imageView sd_setImageWithURL:_imagesURLStrings[index]];
}
这些就是轮播图主要的代码组成了，小白的话应该都会用（我也是个小白）
demo地址：http://www.code4app.com/thread-32970-1-1.html
