ios启动载入启动图片

    //首先获取当前版本，从plist中获取
//在bundle中查找获取当前对应的version
id key =   (id)kCFBundleVersionKey;
NSDictionary *infoDictionary=[NSBundle mainBundle].infoDictionary;
NSString *currentVersion = [infoDictionary objectForKey:key];
//从沙盒获取的bundle
NSUserDefaults *defaults= [NSUserDefaults standardUserDefaults];
NSString *defaultVersion = [defaults objectForKey:key];
if ([defaultVersion isEqual:currentVersion]) {
self.window.rootViewController = [[CSMainBarController alloc]init];
}else
{
CSLaunchView *indexView = [[CSLaunchView alloc]init];
self.window.rootViewController = indexView;
}

//
//  CSLaunchView.m
//  diary
//
//  Created by asheng123 on 15/4/13.
//  Copyright (c) 2015年 asheng123. All rights reserved.
//

#import "CSLaunchView.h"
#define LaunchImage 4
@interface CSLaunchView()<UIScrollViewDelegate>
@property(nonatomic,weak)UIPageControl *mypage;
@end
@implementation CSLaunchView
-(void)viewDidLoad
{
//载入对应的scrollview的一些信息
    [self loadScrollView];
//加载一个pagecontrol
    [self loadPageControl];
}
-(void)loadPageControl
{
UIPageControl *pageControl= [[UIPageControl alloc]init];
self.mypage = pageControl;
pageControl.numberOfPages = LaunchImage;
pageControl.x = self.view.size.width*0.5;
pageControl.y  = self.view.size.height - 30;
pageControl.pageIndicatorTintColor = [UIColor grayColor];
pageControl.currentPageIndicatorTintColor = [UIColor blackColor];
[self.view addSubview:pageControl];
}
-(void)loadScrollView
{
//创建一个scorllview
UIScrollView *theScorll= [[UIScrollView alloc]init];
//设置对应的尺寸
theScorll.frame =self.view.bounds;
theScorll.delegate = self;
CGFloat imageW = theScorll.frame.size.width;
CGFloat imageH = theScorll.frame.size.height;
[self.view addSubview:theScorll];
for (int i =0; i<LaunchImage; i++) {
//        UIImage *name=[UIImage imageNamed:   [NSString stringWithFormat:@"new_feature_%d",i+1]];
NSString *name = [NSString stringWithFormat:@"new_feature_%d",i+1];
if(phoneInch)
{
[name stringByAppendingString:@"@2x"];
}
UIImageView*theImage = [[UIImageView alloc]initWithImage:[UIImage imageNamed:name]];
[theScorll addSubview:theImage];
theImage.x = imageW*i;
NSLog(@"thescorll width is %f",theScorll.width);
theImage.y =0;
theImage.width = imageW;
theImage.height = imageH;
}
theScorll.contentSize = CGSizeMake(LaunchImage *self.view.width,0);
theScorll.pagingEnabled =YES;
theScorll.bounces =NO;
theScorll.showsHorizontalScrollIndicator =NO;
}
-(void)scrollViewDidScroll:(UIScrollView *)scrollView
{
CGFloat num = (scrollView.contentOffset.x /self.view.width);
int intPage = (int)(num +0.5);
self.mypage.currentPage=intPage;
}
@end