UI 界面设计 滚动视图

#import "ViewController.h"

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

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

@interface
ViewController ()<UIScrollViewDelegate>

@property(nonatomic,strong)UIScrollView
*scrollview;

@property(nonatomic,strong)UIPageControl
*pageContol;

@property(nonatomic,retain)NSMutableArray
*image;

@end

@implementation ViewController

- (instancetype)initWithCoder:(NSCoder *)coder

{

self = [superinitWithCoder:coder];

if (self) {

self.title =@"相册";

}

returnself;

}

- (void)viewDidLoad {

[superviewDidLoad];

self.automaticallyAdjustsScrollViewInsets =NO;

//滚动视图

_scrollview = [[UIScrollViewalloc]init];

_scrollview.bounds =CGRectMake(0,0,
SCROLL_L,SCROLL_R);

_scrollview.center =self.view.center;

_scrollview.backgroundColor = [UIColor
whiteColor];

_scrollview.contentSize =CGSizeMake(SCROLL_L
*8,SCROLL_R);

_scrollview.pagingEnabled =YES;

_scrollview.directionalLockEnabled =YES;

_scrollview.showsHorizontalScrollIndicator =NO;

_scrollview.showsVerticalScrollIndicator =NO;

_scrollview.delegate =self;

[self.viewaddSubview:_scrollview];

_image= [NSMutableArrayarray];

for (NSInteger index =1; index<7;
index++) {

NSString *filenname = [NSStringstringWithFormat:@"haiz%ld.jpg",index];

[_imageaddObject:filenname];

}

[_imageaddObject:@"haiz1副本.jpg"];

[_imageinsertObject:@"haiz6.jpg"atIndex:0];

for (NSInteger index=0; index<8;
index++) {

UIImageView *imageBV = [[UIImageViewalloc]initWithFrame:CGRectMake(SCROLL_L*index,0,
SCROLL_L,SCROLL_R)];

imageBV.userInteractionEnabled =YES;

imageBV.image = [UIImageimageNamed:_image[index]];

[_scrollviewaddSubview:imageBV];

}

//分页控制控件

_pageContol = [[UIPageControlalloc]init];

_pageContol.bounds =CGRectMake(0,0,
SCROLL_L,30);

_pageContol.center = CGPointMake(CGRectGetMidX(self.view.bounds),CGRectGetMidY(self.view.bounds)+260);

_pageContol.numberOfPages =6;

_pageContol.currentPage=0;

_pageContol.currentPageIndicatorTintColor= [UIColorredColor];

[self.viewaddSubview:_pageContol];

//点击隐藏

UITapGestureRecognizer *tapGesturRecognizer = [[UITapGestureRecognizeralloc]
initWithTarget:selfaction:@selector(tapGes:)];

[_scrollviewaddGestureRecognizer:tapGesturRecognizer];

}

#pragma mark--------------UIScrollViewDelegate

-(void)scrollViewDidScroll:(UIScrollView *)scrollView{

// //当处于真的第一张图片右滑动的时候，直接跳转到假的第一张

// NSInteger curreb=round(scrollView.contentOffset.x/SCROLL_L);

// _pageContol.currentPage = curreb;

NSLog(@"%f",scrollView.contentOffset.x

);

//处理pageControl

NSInteger currentPage = (NSInteger)round(scrollView.contentOffset.x
/SCROLL_L);

if (scrollView.contentOffset.x >CGRectGetWidth(self.view.bounds)
* 6) {

//在真的最后一张图片向左滑动

_pageContol.currentPage =0;

} elseif (scrollView.contentOffset.x
<CGRectGetWidth(self.view.bounds
)) {

//在真的第一张图片向右滑动

_pageContol.currentPage =5;

} else {

//正常情况

_pageContol.currentPage = currentPage -1;

}

//如果是在真正第一张图片向右滑动，则跳到假的的第一张图片

if (scrollView.contentOffset.x <CGRectGetWidth(self.view.bounds))
{

[scrollView setContentOffset:CGPointMake(CGRectGetWidth(self.view.bounds)
* 7,
0) animated:NO];

//如果是在假的第一张张图片向左滑动，则跳到真正第一张图片

} elseif (scrollView.contentOffset.x
>CGRectGetWidth(self.view.bounds)
* 7) {

[scrollView setContentOffset:CGPointMake(CGRectGetWidth(self.view.bounds),0)
animated:NO];

}

}

-(void)tapGes:(UITapGestureRecognizer *)sender{

if (self.navigationController.navigationBar.hidden)
{

[self.navigationControllersetNavigationBarHidden:NOanimated:YES];

} else {

[self.navigationControllersetNavigationBarHidden:YESanimated:YES];

}

}