切换根控制器UIApplication 主屏幕UIScreen 读取文件资源NSBundle

//主屏幕设为webView
CGRect frame = [UIScreen mainScreen].applicationFrame;
UIWebView *webView = [[[UIWebView alloc] initWithFrame:frame] autorelease];
self.view = webView;

UIApplication *app = [UIApplication sharedApplication];
// 显示状态栏
 app.statusBarHidden = NO;
ChangeController *index = [[ChangeController alloc] init];
// 设置窗口的根控制器
app.keyWindow.rootViewController = index;
[index release];

//回到根控制器
popToRootViewControllerAnimationed:YES
3 //返回
4 popViewControllerAnimated

 

  id key = (id)kCFBundleVersionKey;
1 // 检测是否第一次使用这个版本  info.plist
NSDictionary *info = [NSBundle mainBundle].infoDictionary;
NSString *currentVersion = [info objectForKey:key];
    
// 从沙盒中取出版本号
NSUserDefaults *defaults =[NSUserDefaults standardUserDefaults];
 NSString *saveVersion = [defaults objectForKey:key];

//获取图片
 NSString *path = [[NSBuddle mainBuddle] pathForResource:@"resourceName" oftype@"plist"];
UIImage *image = [[UIImage imageWithContentsOfFile:path];
UIImage *image = [UIImage imageNamed:@"imageName"];

//获取plist文件
NSArray *array =[[NSArrayalloc] initWithContentsOfFile:[[NSBundle mainBundle]  pathForResource:@"name" ofType:@"plist"]];
NSDictionary *dict=[array objectAtIndex:index];