UIKit 框架之UIPageControl

//

//  ViewController.m

//  UIPageControl

//

//  Created by City--Online on 15/5/19.

//  Copyright (c) 2015年 XQB. All rights reserved.

//



#import "ViewController.h"



@interface ViewController ()

@property(nonatomic,strong) UIPageControl  *pageControl;

@end



@implementation ViewController



- (void)viewDidLoad {

    [super viewDidLoad];

    _pageControl=[[UIPageControl alloc]init];

    _pageControl.frame=CGRectMake(20, 100, 100, 100);

    _pageControl.backgroundColor=[UIColor grayColor];



    //设置总页数

    _pageControl.numberOfPages=5;

    

    //设置当前页

    _pageControl.currentPage=2;

    

    //只有1页时隐藏

    _pageControl.hidesForSinglePage=YES;

    

    //根据页数获取需要的最小的size

    CGSize size=[_pageControl sizeForNumberOfPages:5];

    _pageControl.frame=CGRectMake(20, 100, size.width, size.height);

    NSLog(@"%@",NSStringFromCGSize(size));

    

    //设置圆点的颜色

    _pageControl.pageIndicatorTintColor=[UIColor blueColor];

    //设置当前选中圆点的颜色

    _pageControl.currentPageIndicatorTintColor=[UIColor yellowColor];

    

    //这个属性如果设置为YES，点击时并不会改变控制器显示的当前页码点，必须手动调用- (void)updateCurrentPageDisplay;这个方法，才会更新。

    _pageControl.defersCurrentPageDisplay=YES;

    

    [_pageControl addTarget:self action:@selector(pageIndexChanged) forControlEvents:UIControlEventValueChanged];

    

    [self.view addSubview:_pageControl];

    

}

-(void)pageIndexChanged

{

    NSInteger index=_pageControl.currentPage;

    NSLog(@"%ld",index);

    //暂停5秒钟

    sleep(5);

    //改变显示的页面 defersCurrentPageDisplay=NO时,方法无效

    [_pageControl updateCurrentPageDisplay];

}

- (void)didReceiveMemoryWarning {

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}



@end

 此控件经常与UIScrollView控件一起使用。