轮播图封装

//

// JKlunbotu.h

// JKqyApp

//

// Created by dllo on 16/1/6.

// Copyright © 2016年 dllo. All rights reserved.

//

#import <UIKit/UIKit.h>

@protocol JKlunbotuDelegate <NSObject>

- (void)jklunbotuWithStr:(NSInteger)str;

@end

@interface JKlunbotu :
UIView

- (instancetype)initWithFrame:(CGRect)frame;

@property (nonatomic,
assign)id <JKlunbotuDelegate>delegate;

@property (nonatomic,
retain)NSMutableArray *lunboArr;

@end

//

// JKlunbotu.m

// JKqyApp

//

// Created by dllo on 16/1/6.

// Copyright © 2016年 dllo. All rights reserved.

//

#import "JKlunbotu.h"

#import "UIImageView+WebCache.h"

#import "FIrstpageFind.h"

#define WIDGHT [[UIScreen mainScreen] bounds].size.width

#define WIDTHSIXP 375.000000

#define HEIGHTSIXP 667.000000

#define HEIGHT [[UIScreen mainScreen] bounds].size.height

@interface
JKlunbotu ()<UIScrollViewDelegate>

@property (nonatomic,
retain)UIScrollView *srollview;

@property (nonatomic,
retain)UIPageControl *panC;

@property (nonatomic,
assign)NSInteger previouspage;

@property (nonatomic,
retain)NSTimer *timer;

@end

@implementation JKlunbotu

- (void)dealloc {

_delegate =
nil;

_timer = nil;

[_lunboArr
release];

[super dealloc];

}

- (instancetype)initWithFrame:(CGRect)frame

{

self = [super
initWithFrame:frame];

if (self) {

[self createview];

}

return
self;

}

- (void)setLunboArr:(NSMutableArray *)lunboArr

{

if (_lunboArr != lunboArr) {

[_lunboArr
release];

_lunboArr = [lunboArr
retain];

}

//
刷新scrollview

[self
reloadData];

// // 创建计时器

[self
kaishitimer];

}

- (void)kaishitimer

{

NSTimer *timer = [NSTimer
scheduledTimerWithTimeInterval:5 target:self
selector:@selector(timerAct)
userInfo:nil
repeats:YES];

//加入主循环池中

[[NSRunLoop
mainRunLoop] addTimer:timer
forMode:NSDefaultRunLoopMode];

_timer = timer;

}

- (void)timerAct

{

if (self.lunboArr.count > 1) {

self.panC.currentPage = (self.previouspage
+ 1) % self.lunboArr.count;

[self panCact];

[UIView
animateWithDuration:.5 animations:^{

[UIView
setAnimationCurve:UIViewAnimationCurveEaseInOut];

self.srollview.contentOffset =
CGPointMake(self.srollview.frame.size.width
* (self.panC.currentPage + 1), 0);

}];

}

}

- (void)reloadData

{

//page
页数

self.panC.numberOfPages =
self.lunboArr.count;

//scrollView

self.srollview.contentSize =
CGSizeMake(WIDGHT * (self.lunboArr.count
+ 2), 0);

[self
addImagetosrollv];

}

- (void)addImagetosrollv

{

for (NSInteger i = 0;i <
self.lunboArr.count + 2; i++) {

//创建一个imageView
往scroll铺

UIImageView *imageV = [[UIImageView
alloc] initWithFrame:CGRectMake(WIDGHT * i , 0,
WIDGHT, 170 / HEIGHTSIXP *
HEIGHT)];

imageV.userInteractionEnabled =
YES;

//此处重点:多加两张图(最后一张和第一张)

if (0 == i) {

//第一张图
的位置
最后一张

// imageV.image = [self.imagelunboArr lastObject];

FIrstpageFind *find = [self.lunboArr
lastObject];

// NSLog(@"%@", find.picUrl);

[imageV sd_setImageWithURL:[NSURL
URLWithString:find.picUrl]
placeholderImage:[UIImage
imageNamed:@"2.jpg"]];

}else if(self.lunboArr.count + 1 == i) {

//最后一张的位置
铺第一张图

// imageV.image = self.imageArr[0] ;

FIrstpageFind *find = [self.lunboArr
firstObject];

// NSLog(@"%@", find.picUrl);

[imageV sd_setImageWithURL:[NSURL
URLWithString:find.picUrl]
placeholderImage:[UIImage
imageNamed:@"2.jpg"]];

}else {

//i - 1: scroll是从 1
开始的
不是 0

// imageV.image = self.imageArr[i - 1];

FIrstpageFind *find = [self.lunboArr
objectAtIndex:i- 1];

// NSLog(@"%@", find.picUrl);

[imageV sd_setImageWithURL:[NSURL
URLWithString:find.picUrl]
placeholderImage:[UIImage
imageNamed:@"zhanweitu.jpg"]];

// //添加标题

}

//添加手势

UITapGestureRecognizer *imageTap = [[UITapGestureRecognizer
alloc] initWithTarget:self
action:@selector(imageTapAct)];

[imageV addGestureRecognizer:imageTap];

[imageTap release];

[self.srollview
addSubview:imageV];

[imageV release];

}

}

- (void)imageTapAct

{

[self.delegate
jklunbotuWithStr:self.panC.currentPage];

}

- (void)createview

{

//创建srollview

self.backgroundColor = [UIColor
whiteColor];

[self
createScrollView];

[self
createPageControll];

}

- (void)createScrollView

{

self.srollview = [[UIScrollView
alloc]initWithFrame:CGRectMake(0, 0,
WIDGHT, 170/
HEIGHTSIXP *
HEIGHT)];

self.srollview.showsHorizontalScrollIndicator =
NO;

self.srollview.delegate =
self;

self.srollview.pagingEnabled =
YES;

self.srollview.contentOffset =
CGPointMake(WIDGHT, 0);

[self
addSubview:self.srollview];

[self.srollview
release];

}

- (void)createPageControll

{

self.panC = [[UIPageControl
alloc]initWithFrame:CGRectMake(0,
self.bounds.size.height - 20, 200/
WIDTHSIXP *
WIDGHT, 20 /
HEIGHTSIXP *
HEIGHT )];

self.panC.backgroundColor = [UIColor
clearColor];

self.panC.currentPageIndicatorTintColor = [UIColor
orangeColor];

self.panC.pageIndicatorTintColor = [UIColor
whiteColor];

[self.panC
addTarget:self
action:@selector(panCact)
forControlEvents:UIControlEventValueChanged];

[self
addSubview:self.panC];

[self.panC
release];

}

//设置页随点动

- (void)panCact

{

// 记住每一次改变后的图片前一页是哪一张

self.previouspage =
self.srollview.contentOffset.x /
self.bounds.size.width;

[self.srollview
setContentOffset:CGPointMake(self.bounds.size.width
* (self.panC.currentPage), 0)];

}

// 设置点随页动

- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView

{

//设置
点随页动

NSInteger index = scrollView.contentOffset.x / scrollView.frame.size.width;

if (0 == index) {

self.srollview.contentOffset =
CGPointMake(self.frame.size.width * (self.lunboArr.count
+ 1) , 0);

self.panC.currentPage =
self.lunboArr.count + 1;

}

else if (self.lunboArr.count + 1 == index) {

self.srollview.contentOffset =
CGPointMake(self.frame.size.width , 0);

self.panC.currentPage = 0;

} else {

self.panC.currentPage = index - 1;

}

}

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

{

[self
kaishitimer];

}

- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView

{

[self.timer
invalidate];

// self.timer = nil;

}

/*

// Only override drawRect: if you perform custom drawing.

// An empty implementation adversely affects performance during animation.

- (void)drawRect:(CGRect)rect {

// Drawing code

}

*/

@end