先创建第三方文件,命名为 ImageScrollView 继承于 UIScrollView
.h文件
#import <UIKit/UIKit.h>
/// 表示图片滚动视图的样式
typedef enum {
ImageScrollType_Guide = 100, // 开机guide视图样式
ImageScrollType_Banner // banner栏样式
}ImageScrollType;
/// 协议，触发事件回调的方法
@protocol ImageScrollViewDelegate <NSObject>
@optional
/// “guide”样式的最后一个视图上的“立即体验”按钮触发
-(void)experienceDidHandle;
/// “banner”样式每一个图片触发回调的方法;index表示选中的图片的下标
-(void)bannerImageDidHandleWithIndex:(NSInteger)index;
@end
@interface ImageScrollView : UIScrollView
/// 参数1：滚动视图位置（建议以4.7寸屏设置）; 参数2：样式 ; 参数3：图片名称数组 ; 参数4：guide样式的“立即体验”按钮标题；参数5：guide样式的“立即体验”按钮位置；参数6：banner轮播图时间间隔 ; 参数7：代理设置，用于触发事件回调
-(instancetype)initWithFrame:(CGRect)frame
style:(ImageScrollType)type
images:(NSArray *)imgNameArr
confirmBtnTitle:(NSString *)title
confirmBtnTitleColor:(UIColor *)titleColor
confirmBtnFrame:(CGRect)btnFrame
autoScrollTimeInterval:(NSTimeInterval)interval
delegate:(id<ImageScrollViewDelegate>)delegate;
/// 给ImageScrollView的父视图添加分页控件,必须在把ImageScrollView加为父视图的子视图之后再调用此方法
-(void)addPageControlToSuperView:(UIView *)superView;
@end
.m文件
#import "ImageScrollView.h"
#define SCR_W [UIScreen mainScreen].bounds.size.width // 屏幕宽度
#define SCR_H [UIScreen mainScreen].bounds.size.height // 屏幕高度
#define FIT_X(x) (SCR_W/375.*(x)) // 用于x轴适配
#define FIT_Y(y) (SCR_H/667.*(y)) // 用于y轴适配
@interface ImageScrollView ()<UIScrollViewDelegate>
{
ImageScrollType _type; // 样式
NSString *_confirmBtnTitle; // 确认按钮标题
CGRect _confirmBtnFrame; // 确认按钮位置
UIColor *_confirmBtnTitleColor; // 确认按钮标题颜色
NSUInteger _imgCount; // 图片个数
CGFloat _disx;//在x轴的移动距离
}
@property(nonatomic,assign)id<ImageScrollViewDelegate>scDelegate;
@property(nonatomic,strong)NSTimer *myTimer; // 定时器
@property(nonatomic,strong)UIPageControl *pageCtl; // 分页控件
@end
@implementation ImageScrollView
#pragma mark - 对外接口
/// 实例化方法
-(instancetype)initWithFrame:(CGRect)frame
style:(ImageScrollType)type
images:(NSArray *)imgNameArr
confirmBtnTitle:(NSString *)title
confirmBtnTitleColor:(UIColor *)titleColor
confirmBtnFrame:(CGRect)btnFrame
autoScrollTimeInterval:(NSTimeInterval)interval
delegate:(id<ImageScrollViewDelegate>)delegate {
self = [super initWithFrame:frame];
if (self) {
if (type == ImageScrollType_Guide)
{
// 设置内容视图大小
self.contentSize = CGSizeMake(frame.size.width * imgNameArr.count, frame.size.height);
}
else
{
// 设置内容视图大小
self.contentSize = CGSizeMake(frame.size.width * (imgNameArr.count+2), frame.size.height);
}
// 样式赋值
_type = type;
// 图片数量赋值
_imgCount = imgNameArr.count;
// guide样式固定大小
if (type == ImageScrollType_Guide) {
self.frame = CGRectMake(0, 0, SCR_W, SCR_H);
self.contentSize = CGSizeMake(SCR_W * imgNameArr.count, SCR_H);
_confirmBtnTitle = title;
_confirmBtnFrame = btnFrame;
_confirmBtnTitleColor = titleColor;
}
// 隐藏滚动条
self.showsVerticalScrollIndicator = NO;
self.showsHorizontalScrollIndicator = NO;
// 开启分页属性
self.pagingEnabled = YES;
// 设置UIScrollView代理
self.delegate = self;
// 设置自定义的代理
self.scDelegate = delegate;
// 添加图片子视图
[self addImageSubViews:imgNameArr];
// 添加定时器
if(type == ImageScrollType_Banner) {
self.myTimer = [NSTimer scheduledTimerWithTimeInterval:interval target:self selector:@selector(timerDidHandle:) userInfo:nil repeats:YES];
}
}
return self;
}
/// 添加分页控件方法
-(void)addPageControlToSuperView:(UIView *)superView {
[superView addSubview:self.pageCtl];
}
#pragma mark - 分页控制器实例化getter重写
/// 添加分页子视图
-(UIPageControl *)pageCtl{
if (!_pageCtl) {
_pageCtl = [[UIPageControl alloc] initWithFrame:CGRectMake(0, 0, FIT_X(300), FIT_Y(25))];
if (_type == ImageScrollType_Guide)
{
_pageCtl.center = CGPointMake(SCR_W/2, SCR_H-FIT_Y(30));
}
else
{
_pageCtl.center = CGPointMake(self.frame.origin.x + self.frame.size.width/2 , self.frame.origin.y+self.frame.size.height-FIT_Y(25));
}
_pageCtl.pageIndicatorTintColor = [UIColor grayColor];
_pageCtl.currentPageIndicatorTintColor = [UIColor redColor];
_pageCtl.hidesForSinglePage = YES;
_pageCtl.numberOfPages = _imgCount;
_pageCtl.currentPage = 0;
}
return _pageCtl;
}
#pragma mark - 添加图片子视图
/// 添加图片子视图
-(void)addImageSubViews:(NSArray *)imgNameArr
{
// guide样式
if (_type == ImageScrollType_Guide)
{
for (int i = 0; i<imgNameArr.count; i++)
{
// 实例化图形视图
UIImageView *imgView = [[UIImageView alloc] initWithFrame:CGRectMake(0 + i * self.frame.size.width, 0, self.frame.size.width, self.frame.size.height)];
// 添加为滚动视图的子视图
[self addSubview:imgView];
// 设置图形视图的图片
imgView.image = [UIImage imageNamed:imgNameArr[i]];
// 最后一个图形视图
if(i==imgNameArr.count-1)
{
imgView.userInteractionEnabled = YES;
UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
btn.frame = _confirmBtnFrame;
[btn setTitle:_confirmBtnTitle forState:UIControlStateNormal];
[btn setTitleColor:_confirmBtnTitleColor forState:UIControlStateNormal];
[btn addTarget:self action:@selector(confirmBtnDidHandle:) forControlEvents:UIControlEventTouchUpInside];
[imgView addSubview:btn];
}
}
}
// banner 样式
else
{
for (int i = 0; i < imgNameArr.count+2; i++)
{
UIImageView *imgView = [[UIImageView alloc] initWithFrame:CGRectMake(0+self.frame.size.width*i, 0, self.frame.size.width, self.frame.size.height)];
// 添加为self的子视图
[self addSubview:imgView];
if (i == 0) // 第一个图片子视图加载的是图片数组中最后一张图片
{
imgView.image = [UIImage imageNamed:imgNameArr[imgNameArr.count-1]];
imgView.tag = imgNameArr.count -1;
}
else if (i == imgNameArr.count +1)// 最后一个图片子视图加载的是图片数组的第一张
{
imgView.image = [UIImage imageNamed:imgNameArr[0]];
imgView.tag = 0;
}
else // 中间图片子视图的图片设置
{
imgView.image = [UIImage imageNamed:imgNameArr[i-1]];
imgView.tag = i-1;
}
imgView.userInteractionEnabled = YES;
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapDidHandle:)];
[imgView addGestureRecognizer:tap];
// 首先设定_disX的初始值
_disx = self.frame.size.width;
// 设置子视图的开始的滚动位置
[self setContentOffset:CGPointMake(_disx, 0)animated:NO];
}
}
}
#pragma mark - 触发方法
// 定时器触发的方法
-(void)timerDidHandle:(NSTimer *)t
{
_disx += self.frame.size.width;
// 让滚动视图滚动至该位置
//[self setContentOffset:CGPointMake(_disx, self.frame.origin.y)animated:YES];
[self scrollRectToVisible:CGRectMake(_disx, self.frame.origin.y, self.frame.size.width, self.frame.size.height) animated:YES];
}
/// guide最后视图上的“立即体验”按钮触发
-(void)confirmBtnDidHandle:(UIButton *)btn {
if ([self.scDelegate respondsToSelector:@selector(experienceDidHandle)]) {
[self.scDelegate experienceDidHandle];
}
}
/// banner图片点击后触发
-(void)tapDidHandle:(UITapGestureRecognizer *)tap {
// 获取触发了该点击手势的视图对象
UIView *tapView = tap.view;
if (![tapView isKindOfClass:[UIImageView class]]) {
return;
}
NSInteger tag = tapView.tag;
if ([self.scDelegate respondsToSelector:@selector(bannerImageDidHandleWithIndex:)]) {
[self.scDelegate bannerImageDidHandleWithIndex:tag];
}
}
#pragma mark - UIScrollViewDelegate
-(void)scrollViewDidScroll:(UIScrollView *)scrollView
{
// guide样式
if (_type == ImageScrollType_Guide)
{
// 获取滚动视图滚动的距离
CGPoint pos = scrollView.contentOffset;
// 获取当前的分页的下标
NSInteger index = (int)(pos.x/self.frame.size.width);
// 改变分页控制器的当前下标
self.pageCtl.currentPage = index;
}
// Banner样式
else
{
// 获取滚动视图滚动的距离
CGPoint pos = scrollView.contentOffset;
// 赋值
_disx = pos.x;
// 如果滚动到第一张子视图,其实显示的是倒数第2个子视图
if (_disx == 0)
{
[self setContentOffset:CGPointMake(self.frame.size.width *_imgCount, 0) animated:NO];
}
// 如果滚动到最后一张子视图,其实显示的是第2个子视图
else if (_disx == self.frame.size.width *(_imgCount+1))
{
[self setContentOffset:CGPointMake(self.frame.size.width, 0) animated:NO];
}
}
/*
设置分页控制器当前的分页
*/
// 最后一张图的点
if (_disx == 0 || _disx == self.frame.size.width * _imgCount)
{
self.pageCtl.currentPage = _imgCount-1;
}
// 第一张图
else if (_disx == self.frame.size.width || _disx == self.frame.size.width *(_imgCount +1))
{
self.pageCtl.currentPage = 0;
}
// 其他图片
else
{
self.pageCtl.currentPage = (int) (_disx / self.frame.size.width)-1;
}
}
在ViewController中导入头文件
#import "ViewController.h"
#import "ImageScrollView.h"
在书写以下代码
self.view.backgroundColor = [UIColor whiteColor];
NSArray *imaArr = @[@"军队1.jpeg",@"军队2.png",@"女排1.jpeg"];
ImageScrollView *imgScrollView = [[ImageScrollView alloc]initWithFrame:CGRectMake(10, 100, 200, 200) style:ImageScrollType_Banner images:imaArr confirmBtnTitle:nil confirmBtnTitleColor:nil confirmBtnFrame:CGRectNull autoScrollTimeInterval:3.0 delegate:self];
[self.view addSubview:imgScrollView];
[imgScrollView addPageControlToSuperView:self.view];
}
