判断是否是 首次 进入app，，以及Xcode7之后前导页的设置

我的解决方案：...

1、在appdelegate.m中找到

“application:didFinishLaunchingWithOptions:”方法, 添加以下代码:

/**

*      前导页

*/

if([[[NSUserDefaults standardUserDefaults] objectForKey:@"isExisted"]isEqualToString:@"exist"]){

[self gotoMain];

NSLog(@"222222222");

}else{

FirstLaunchViewController *firstLaunchVC = [[FirstLaunchViewController alloc]init];

self.window.rootViewController = firstLaunchVC;

NSLog(@"111111111");

}

-(void)gotoMain

{

NSLog(@"主页。。。");

[[NSUserDefaults standardUserDefaults] setObject:@"exist" forKey:@"isExisted"];

MainViewController *firstLaunchVC = [[MainViewController alloc]init];

self.window.rootViewController = firstLaunchVC;

NSLog(@"111111111");

}

总的解决办法是 key: @”isExisted” 对应的value 是不是“exist”判断用户以前是否登录,

在第一次启动的时候 key @” isExisted” 不会被赋址的, 也就是说value为nil.

2、前导页

新建FirstLaunchViewController文件，走完前导页，调用的APPDelegate.h方法进入主页界面。。。

#import "JYEFirstLaunchViewController.h"

#import "AppDelegate.h"

@interface FirstLaunchViewController ()<UIScrollViewDelegate>

{

UIPageControl * pageCtr;

BOOL isOut;//判断是否进入主页

}

@end

@implementation JYEFirstLaunchViewController

- (void)viewDidLoad {

[super viewDidLoad];

// Do any additional setup after loading the view.

[self gotoLaunchView];

}

-(void)gotoLaunchView

{

NSLog(@"引导页");

UIScrollView * scroll = [[UIScrollView alloc]initWithFrame:[UIScreen mainScreen].bounds];

scroll.pagingEnabled = YES;

scroll.delegate = self;

scroll.contentOffset = CGPointMake(0, 0);

scroll.contentSize = CGSizeMake(self.view.frame.size.width * 3, self.view.frame.size.height);

//    scroll.bounces = NO;//让scrollView在他的自身范围内滑动//在这里添加“进入应用Button”

[self.view addSubview:scroll];

NSArray * imageArr = @[@"Default1@2x.png",@"Default2@2x.png",@"Default3@2x.png"];

for(int i = 0;i<imageArr.count;i++)

{

UIImageView * imageView = [[UIImageView alloc]initWithFrame:CGRectMake(self.view.frame.size.width * i, 0, self.view.frame.size.width, self.view.frame.size.height)];

imageView.image = [UIImage imageNamed:imageArr[i]];

[scroll addSubview:imageView];

}

pageCtr = [[UIPageControl alloc]initWithFrame:CGRectMake(50, scroll.frame.size.height - 30, scroll.frame.size.width - 100, 30)];

pageCtr.currentPage = 0;

pageCtr.numberOfPages = imageArr.count;

pageCtr.pageIndicatorTintColor = [UIColor redColor];

[self.view addSubview:pageCtr];

}

-(void)scrollViewDidScroll:(UIScrollView *)scrollView

{

if(scrollView.contentOffset.x > self.view.frame.size.width * 2)

{

//跳到主界面

isOut = YES;

}

}

-(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView

{

pageCtr.currentPage = scrollView.contentOffset.x / self.view.frame.size.width;

if(isOut)

{

[UIView animateWithDuration:0.1 animations:^{

scrollView.alpha = 0;

} completion:^(BOOL finished) {

[scrollView removeFromSuperview];

[self gotoMain1];

}];

}

}

-(void)gotoMain1{

AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];

[appDelegate gotoMain];

NSLog(@"zhuye");

}