iOS最笨的办法实现无限轮播图(网络加载)
使用方法: 把 请求返回的 图片地址(字符串类型)放进数组中就行
可以使用SDWebImage(我就是用的这个)等。。需要自己导入并引用,然后修改部分代码
.h文件
// ScrollViewTimerView.h
// ScrollViewTimer
//
// Created by 郑鹏 on 2016/12/9.
// Copyright © 2016年 郑鹏. All rights reserved.
//
#import <UIKit/UIKit.h>
@protocol ScrollViewTimerViewDelegate <NSObject>
- (void)didSelectScrollViewWithSelectIndex:(NSInteger)selectIndex;
@end
@interface ScrollViewTimerView : UIView
@property (nonatomic, weak) id<ScrollViewTimerViewDelegate> littleSunDelegate;
- (instancetype)initWithFrame:(CGRect)frame animationDuration:(NSTimeInterval)animationDuration;
@property (nonatomic, strong) NSMutableArray * wheelImgArray;//轮播图 数组
//是否需要
@property (nonatomic, assign) BOOL isHidePageControl;
@end
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
- 15
- 16
- 17
- 18
- 19
- 20
- 21
- 22
- 23
- 24
- 25
- 26
- 27
- 28
.m文件
//
// ScrollViewTimerView.m
// ScrollViewTimer
//
// Created by 郑鹏 on 2016/12/9.
// Copyright © 2016年 郑鹏. All rights reserved.
//
#import "ScrollViewTimerView.h"
#import "UIImageView+WebCache.h"
@interface ScrollViewTimerView ()<UIScrollViewDelegate>{
NSTimer *_animationTimer;
UIScrollView *_littleSunScrollView;
UIPageControl *_pageControl;
}
@end
@implementation ScrollViewTimerView
- (instancetype)initWithFrame:(CGRect)frame animationDuration:(NSTimeInterval)animationDuration{
self = [super initWithFrame:frame];
_littleSunScrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, frame.size.width, frame.size.height)];
_littleSunScrollView.delegate = self;
_littleSunScrollView.pagingEnabled = YES;
_littleSunScrollView.showsHorizontalScrollIndicator = NO;
_littleSunScrollView.showsVerticalScrollIndicator = NO;
_littleSunScrollView.contentOffset = CGPointMake(self.frame.size.width, 0);
[self addSubview:_littleSunScrollView];
_animationTimer = [NSTimer scheduledTimerWithTimeInterval:animationDuration
target:self
selector:@selector(animationTimerDidFired:)
userInfo:nil
repeats:YES];
[[NSRunLoop currentRunLoop] addTimer:_animationTimer forMode:UITrackingRunLoopMode];
[self pauseTimer];
return self;
}
- (void)animationTimerDidFired:(NSTimer *)timer{
CGPoint newOffset = CGPointMake(_littleSunScrollView.contentOffset.x + CGRectGetWidth(self.frame), _littleSunScrollView.contentOffset.y);
[_littleSunScrollView setContentOffset:newOffset animated:YES];
if (_littleSunScrollView.contentOffset.x >= (_wheelImgArray.count+1)*self.frame.size.width) {
[self startTimerAfterTimeInterval:-2.0f];
[_littleSunScrollView setContentOffset:CGPointMake(self.frame.size.width, 0) animated:NO];
}
}
#pragma mark- UIScrollViewDelegate
- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView{
[self pauseTimer];
}
- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{
[self startTimerAfterTimeInterval:2.0f];
}
-(void)scrollViewDidScroll:(UIScrollView *)scrollView{
if (_littleSunScrollView.contentOffset.x >= (_wheelImgArray.count+1)*self.frame.size.width) {
[_littleSunScrollView setContentOffset:CGPointMake(self.frame.size.width, 0) animated:NO];
}else if (_littleSunScrollView.contentOffset.x <= 0) {
[_littleSunScrollView setContentOffset:CGPointMake(_wheelImgArray.count*self.frame.size.width, 0) animated:NO];
}
if (!_isHidePageControl) {
_pageControl.currentPage = [self getCurrentPageBy:scrollView.contentOffset.x];
}
}
//公开的属性设置
- (void)setWheelImgArray:(NSMutableArray *)wheelImgArray{
if (_wheelImgArray != wheelImgArray) {
_wheelImgArray = wheelImgArray;
_littleSunScrollView.contentSize = CGSizeMake(self.frame.size.width * (wheelImgArray.count + 2), self.frame.size.height);
for (NSInteger i = 0; i < wheelImgArray.count+2; i++) {
if (i == 0) {
[self creatImgViewWithFrame:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height) WithTag:20161212 + wheelImgArray.count - 1 WithImgName:wheelImgArray[wheelImgArray.count - 1]];
}else if(i != wheelImgArray.count+1){
[self creatImgViewWithFrame:CGRectMake(self.frame.size.width*i, 0, self.frame.size.width, self.frame.size.height) WithTag:20161212 + i-1 WithImgName:wheelImgArray[i-1]];
}else if(i == wheelImgArray.count+1){
[self creatImgViewWithFrame:CGRectMake(self.frame.size.width*i, 0, self.frame.size.width, self.frame.size.height) WithTag:20161212 WithImgName:wheelImgArray[0]];
}
}
_pageControl = [[UIPageControl alloc] init];
_pageControl.numberOfPages = _wheelImgArray.count;
_pageControl.frame = CGRectMake(0, self.frame.size.height - 20, self.frame.size.width, 10);
_pageControl.currentPage = 0;
_pageControl.userInteractionEnabled = NO;
[_pageControl setPageIndicatorTintColor:[UIColor colorWithRed:255.0 / 255.0 green:255.0 / 255.0 blue:255.0 / 255.0 alpha:0.5]];
[_pageControl setCurrentPageIndicatorTintColor:[UIColor colorWithRed:255.0 / 255.0 green:255.0 / 255.0 blue:255.0 / 255.0 alpha:1]];
[self addSubview:_pageControl];
[self startTimerAfterTimeInterval:2.0f];
}
}
- (void)creatImgViewWithFrame:(CGRect)frame WithTag:(NSInteger)tag WithImgName:(NSString *)imgName{
UIImageView *imgView = [[UIImageView alloc] initWithFrame:frame];
imgView.userInteractionEnabled =