- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions{    self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];        id key = (id)kCFBundleVersionKey;        // 检测是否第一次使用这个版本        // 新浪微博-Info.plist    NSDictionary *info = [NSBundle mainBundle].infoDictionary;    // 获取当前软件的版本号    NSString *currentVersion = [info objectForKey:key];        // 从沙盒中取出版本号    NSUserDefaults *defaults =[NSUserDefaults standardUserDefaults];    NSString *saveVersion = [defaults objectForKey:key];        // 不是第一次使用这个版本    if ([currentVersion isEqualToString:saveVersion]) {                //MJLog(@"不是第一次使用这个版本");        // 显示状态栏        application.statusBarHidden = NO;                IndexController *index = [[[IndexController alloc] init] autorelease];        self.window.rootViewController = index;            } else { // 第一次使用这个版本        // 更新沙盒中的版本号        [defaults setObject:currentVersion forKey:key];        // 同步到沙盒中        [defaults synchronize];                //MJLog(@"第一次使用这个版本");                // 显示版本新特性控制器        NewFeatureController *new = [[[NewFeatureController alloc] init] autorelease];        self.window.rootViewController = new;    }    [self.window makeKeyAndVisible];    return YES;}

 

 

 

#define kNewFeatureListName @"new_feature"#define kNewFeatureListExt @"plist"#import "NewFeatureController.h"#import "IndexController.h"#import 
     
      @interface NewFeatureController ()@end@implementation NewFeatureController#pragma mark - 按钮点击- (void)start {    UIApplication *app = [UIApplication sharedApplication];    // 显示状态栏    app.statusBarHidden = NO;        IndexController *index = [[IndexController alloc] init];        // 设置窗口的根控制器    app.keyWindow.rootViewController = index;        [index release];        // 执行动画    CATransition *anim = [CATransition animation];    anim.duration = 0.4;    anim.type = kCATransitionPush;    anim.subtype = kCATransitionFromRight;    [app.keyWindow.layer addAnimation:anim forKey:nil];}#pragma mark - 生命周期方法- (void)loadView {    // 不需要调用super的loadView        // self.view默认是nil的，一旦发现view是nil，就会调用loadView方法大创建view    // 这里会造成死循环    //self.view = [[UIScrollView alloc] initWithFrame:self.view.bounds];        // 控制器的view最适合的frame    CGRect appFrame = [UIScreen mainScreen].applicationFrame;        // 建议少用autorelease    UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:appFrame];    self.view = scrollView;    [scrollView release];}- (void)viewDidLoad{    [super viewDidLoad];        // 获取new_feature.plist的路径    NSString *path = [[NSBundle mainBundle] pathForResource:kNewFeatureListName ofType:kNewFeatureListExt];    // 加载new_feature.plist    NSArray *array = [NSArray arrayWithContentsOfFile:path];    int count = array.count;        // 设置scrollView的内容宽度    UIScrollView *scrollView = (UIScrollView *)self.view;    scrollView.contentSize = CGSizeMake(count * scrollView.bounds.size.width, 0);        // 设置分页    scrollView.pagingEnabled = YES;    // 隐藏水平的滚动条    scrollView.showsHorizontalScrollIndicator = NO;    // 去除弹簧效果    scrollView.bounces = NO;        for (int index = 0; index< count; index++) {        // 获取图片名称        NSString *imgName = [array objectAtIndex:index];        // 加载图片        UIImage *image = [UIImage imageNamed:imgName];                // 创建UIImageView        UIImageView *imageView = [[UIImageView alloc] initWithImage:image];                // 设置ImageView的x        CGRect frame =  imageView.frame;        frame.origin.x = index * image.size.width;        imageView.frame = frame;                [self.view addSubview:imageView];        [imageView release];                // 添加"开始微博"按钮        if (index == count - 1) {            // 让UIImageView跟用户进行交互（接收触摸事件）            imageView.userInteractionEnabled = YES;                        // 创建按钮            UIButton *btn = [[UIButton alloc] init];            btn.bounds = CGRectMake(0, 0, 100, 35);            btn.center = CGPointMake(image.size.width * 0.5f, image.size.height - 100);                        // 设置默认和高亮背景            [btn setNormalBg:@"new_features_startbutton_background.png" andHighlighted:@"new_features_startbutton_background_highlighted.png"];                        // 设置按钮文字            NSString *title = NSLocalizedString(@"开始微博", nil);            [btn setTitle:title forState:UIControlStateNormal];                        // 设置按钮文字颜色            [btn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];                        // 设置按钮文字大小            btn.titleLabel.font = [UIFont systemFontOfSize:16];                        [imageView addSubview:btn];                        // 监听按钮            [btn addTarget:self action:@selector(start) forControlEvents:UIControlEventTouchUpInside];                        [btn release];        }    }}@end