ios-UIScrollView-常用属性和方法
![](http://images0.cnblogs.com/blog/574347/201501/252054284256580.png)
![](http://images0.cnblogs.com/blog/574347/201501/252054391447687.png)
_uiscroolview=[[UIScrollView alloc]init]; if ([[UIDevice currentDevice].systemVersion floatValue]>6.2) { _uiscroolview.frame=CGRectMake(0, 0, 320, 480); }else{ _uiscroolview.frame=CGRectMake(0, 0, 320, 400); } _uiscroolview.contentSize=CGSizeMake(320*2, 460);//设置内容的大小 _uiscroolview.pagingEnabled=NO;//分页效果是否可用,默认为no _uiscroolview.bounces=YES;//是否有反弹效果,默认为yes _uiscroolview.indicatorStyle=UIScrollViewIndicatorStyleWhite;//滚动条风格 [_uiscroolview flashScrollIndicators];//一显示就显示一下滚动条,用来提示用户的 _uiscroolview.showsHorizontalScrollIndicator=YES;//显示滚动条 _uiscroolview.backgroundColor=[UIColor redColor]; _uiscroolview.contentInset=UIEdgeInsetsMake(20, 20, 50, 30);//4个参数,分别表示可以拉动的边缘扩展的大小,上,左,下,右 _uiscroolview.scrollIndicatorInsets=UIEdgeInsetsMake(20, 20, 50, 30);//同上,不过,这4个参数是用来设置滚动条的,意义相同
-(void)touches:(UIButton*) bb{ //[_uiscroolview setContentOffset:CGPointMake(320, 20) animated:YES];//在scroolview中,跳的位置,x320,y20 [_uiscroolview scrollRectToVisible:CGRectMake(320, 200, 20, 20) animated:YES];//这个是跳转到一个区域,可见就可以了,没有指定是在中间还是哪 }
//下面是一个简单得相册得放大缩小列子,原理本来一个scrollview只能放大缩小一张图,那么我们就将多个scrollview放到一个大地scrollview上
// // RootViewController.m // uiscorrview // // Created by liyang on 14-4-26. // Copyright (c) 2014年 liyang. All rights reserved. // #import "RootViewController.h" @interface RootViewController () @end @implementation RootViewController - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; if (self) { // Custom initialization } return self; } - (void)viewDidLoad { [super viewDidLoad]; //先是添加了一个底部scrollview,因为一个scrollview只能放大一个view _basescrollview =[[UIScrollView alloc]initWithFrame:CGRectMake(0, 0, 340, 460)]; _basescrollview.backgroundColor=[UIColor blackColor]; [self.view addSubview:_basescrollview]; //设置能容大小 _basescrollview.contentSize=CGSizeMake(340*4, 460); _basescrollview.pagingEnabled=YES; _basescrollview.showsVerticalScrollIndicator=NO; _basescrollview.showsHorizontalScrollIndicator=NO; _basescrollview.delegate=self; _basescrollview.tag=INT_MAX; int _x=0; for (int index=0; index<5; index++) { ImageScrollView *imagescrollview=[[ImageScrollView alloc]initWithFrame:CGRectMake(0+_x, 0, 320, 480)]; NSString *imagename=[NSString stringWithFormat:@"%d.jpg",index+1]; imagescrollview.tag=index; UIImage *iamge=[UIImage imageNamed:imagename]; imagescrollview.imageview.image=iamge; imagescrollview.backgroundColor=[UIColor purpleColor]; [_basescrollview addSubview:imagescrollview]; _x+=340; } } //作用就是移动到下一张得时候改变原来得大小 int pre=0; - (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{ int current= _basescrollview.contentOffset.x/340; ImageScrollView *nowscrollview=(ImageScrollView *)[_basescrollview viewWithTag:pre]; if (pre!=current&&nowscrollview.zoomScale>1.0) { nowscrollview.zoomScale=1.0; } pre=current; } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; } @end
// // ImageScrollView.m // uiscorrview // // Created by liyang on 14-4-26. // Copyright (c) 2014年 liyang. All rights reserved. // #import "ImageScrollView.h" @implementation ImageScrollView - (id)initWithFrame:(CGRect)frame { self = [super initWithFrame:frame]; if (self) { //设置图片 _imageview=[[UIImageView alloc]initWithFrame:self.bounds]; [self addSubview:_imageview]; //设置代理 self.delegate=self; //设置方法缩小的参数 self.maximumZoomScale=4.0; self.minimumZoomScale=1; self.showsHorizontalScrollIndicator=NO; self.showsVerticalScrollIndicator=NO; //添加了一个手势动作 UITapGestureRecognizer *taptwo=[[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tapgesture:)]; taptwo.numberOfTapsRequired=2; [self addGestureRecognizer:taptwo]; } return self; } //手势事件 -(void)tapgesture:(UIGestureRecognizer *)gesture{ if (self.zoomScale>=4.0) { [self setZoomScale:1.0 animated:YES]; }else{ CGPoint point= [gesture locationInView:self]; [self zoomToRect:CGRectMake(point.x-40, point.y-40, 80, 80) animated:YES]; } } //代理方法返回方法缩小的view的 - (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView{ return _imageview; } @end
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