iOS实现轮播图banner示例
楼主项目中需要有一个轮播图，因为比较简单，就自己写了个，因为是从网上弄得图片所以用了SDWebImage这个三方库当然自己也可以去掉
类型后面有*号如用使用请自行加上。。。。。
代码：.h文件
@protocolTJXViewDelegate<NSObject> //判断点击的那个 -(void)sendImageName:(TJXView*)TJXViewandName:(NSInteger)selectImage; @end @interfaceTJXView:UIView @property(nonatomic,weak)id<TJXViewDelegate>delegate; //传一个frame和装有图片名字的数组过来 //参数一：frame //参数二：装有图片名字的数组 //参数三：BOOL如果是YES，那么自动滚动，如果是NO不滚动 -(id)initWithFrame:(CGRect)frameandImageNameArray: (NSMutableArray*)imageNameArrayandIsRunning:(BOOL)isRunning; @end
.m文件
@interfaceTJXView()<UIScrollViewDelegate>
{
NSInteger_currentPage;//记录真实的页码数
NSTimer*_timer;//生命一个全局变量
}
@property(nonatomic,assign)BOOLisRun;
@property(nonatomic,strong)NSMutableArray*imageArray;//存储图片的名字
@property(nonatomic,strong)UIScrollView*scrollView;
@property(nonatomic,strong)UIPageControl*pageControl;
@property(nonatomic,assign)CGFloatwidth;//view的宽
@property(nonatomic,assign)CGFloatheight;//view的高
@end
-(id)initWithFrame:(CGRect)frameandImageNameArray:(NSMutableArray*)imageNameArrayandIsRunning:(BOOL)isRunning{
self=[superinitWithFrame:frame];
if(self){
_width=self.frame.size.width;
_height=self.frame.size.height;
//arrayWithArray把数组中的内容放到一个数组中返回
self.imageArray=[NSMutableArrayarrayWithArray:imageNameArray];
//在数组的尾部添加原数组第一个元素
[self.imageArrayaddObject:[imageNameArrayfirstObject]];
//在数组的首部添加原数组最后一个元素
[self.imageArrayinsertObject:[imageNameArraylastObject]atIndex:0];
self.isRun=isRunning;
_currentPage=0;
[selfcreateSro];
[selfcreatePageControl];
[selfcreateTimer];
}
returnself;
}
-(void)createTimer{
if(_isRun==YES){
_timer=[NSTimerscheduledTimerWithTimeInterval:2target:selfselector:@selector(change)userInfo:nilrepeats:YES];
[[NSRunLoopcurrentRunLoop]addTimer:_timerforMode:NSRunLoopCommonModes];}
}
-(void)change{
//1获得当前的点
CGPointpoint=_scrollView.contentOffset;
//2求得将要变换的点
CGPointendPoint=CGPointMake(point.x+_width,0);
//判断
if(endPoint.x==(self.imageArray.count-1)*_width){
[UIViewanimateWithDuration:0.25animations:^{
_scrollView.contentOffset=CGPointMake(endPoint.x,0);
}completion:^(BOOLfinished){
//动画完成的block
_scrollView.contentOffset=CGPointMake(_width,0);
CGPointrealEnd=_scrollView.contentOffset;
//取一遍页码数
_currentPage=realEnd.x/_width;
_pageControl.currentPage=_currentPage-1;
}];
}
else{
//0.25s中更改一个图片
[UIViewanimateWithDuration:0.25animations:^{
_scrollView.contentOffset=endPoint;
}completion:^(BOOLfinished){
}];
CGPointrealEnd=_scrollView.contentOffset;
//取一遍页码数
_currentPage=realEnd.x/_width;
_pageControl.currentPage=_currentPage-1;
}
}
//创建页码指示器
-(void)createPageControl{
_pageControl=[[UIPageControlalloc]initWithFrame:CGRectMake(_width-200,_height-30,100,30)];
_pageControl.centerX=_width/2;
_pageControl.numberOfPages=self.imageArray.count-2;
_pageControl.pageIndicatorTintColor=WP_GRAY_COLOR;
_pageControl.currentPageIndicatorTintColor=[UIColorwhiteColor];
_pageControl.userInteractionEnabled=NO;
[selfaddSubview:_pageControl];
}
//创建滚动视图
-(void)createSro{
_scrollView=[[UIScrollViewalloc]initWithFrame:CGRectMake(0,0,_width,_height)];
_scrollView.contentSize=CGSizeMake(_width*self.imageArray.count,_height);
for(inti=0;i<self.imageArray.count;i++){
UIImageView*imageView=[[UIImageViewalloc]initWithFrame:CGRectMake(i*_width,0,_width,_height)];
//imageView.image=[UIImageimageNamed:self.imageArray[i]];
[imageViewsd_setImageWithURL:self.imageArray[i]placeholderImage:[UIImageimageNamed:@"home_banner_blank"]];
imageView.userInteractionEnabled=YES;
imageView.tag=200+i;
UITapGestureRecognizer*tap=[[UITapGestureRecognizeralloc]initWithTarget:selfaction:@selector(tap:)];
[imageViewaddGestureRecognizer:tap];
[_scrollViewaddSubview:imageView];
}
//水平指示条不显示
_scrollView.showsHorizontalScrollIndicator=NO;
//关闭弹簧效果
_scrollView.bounces=NO;
//设置用户看到第一张
_scrollView.contentOffset=CGPointMake(_width,0);
//设置代理
_scrollView.delegate=self;
//分页效果
_scrollView.pagingEnabled=YES;
[selfaddSubview:_scrollView];
}
-(void)tap:(UITapGestureRecognizer*)tap{
if(_delegate&&[_delegaterespondsToSelector:@selector(sendImageName:andName:)]){
[_delegatesendImageName:selfandName:tap.view.tag-201];
}else{
NSLog(@"没有设置代理或者没有事先协议的方法");
}
}
#pragmamarkUIScrollViewDelegate
//停止滚动
-(void)scrollViewDidEndDecelerating:(UIScrollView*)scrollView{
if(_timer){
[_timersetFireDate:[NSDatedateWithTimeIntervalSinceNow:2]];
}
//图片的个数12345678
//真实的页码01234567
//显示的页码012345
CGPointpoint=_scrollView.contentOffset;
if(point.x==(self.imageArray.count-1)*_width){
scrollView.contentOffset=CGPointMake(_width,0);
}
if(point.x==0){
scrollView.contentOffset=CGPointMake((self.imageArray.count-2)*_width,0);
}
//取一遍页码数
CGPointendPoint=scrollView.contentOffset;
_currentPage=endPoint.x/_width;
_pageControl.currentPage=_currentPage-1;
}
//手指开始触摸的时候，停止计时器
-(void)scrollViewWillBeginDragging:(UIScrollView*)scrollView{
if(_timer){
//如果有，停掉
[_timersetFireDate:[NSDatedistantFuture]];
}
}
在项目中 导入头文件 遵守代理
TJXView*TJXView=[[TJXViewalloc]initWithFrame:CGRectMake(0,0,WPSCREEN_WIDTH,100*WPSCREEN_HIGTH_RATIO)andImageNameArray:self.bannerImagerandIsRunning:YES];
TJXView.delegate=self;
[self.viewaddSubview:TJXView];
#pragmamarkTJXViewDelegate
-(void)sendImageName:(TJXView*)TJXViewandName:(NSInteger)selectImage{
KKLog(@"%ld",(long)selectImage);
}
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持毛票票。