启动一个 vc
OverwriteNavigation * navigationController = [[OverwriteNavigation alloc] initWithRootViewController:drawerController];
[navigationController setNavigationBarHidden:YES];
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.window.rootViewController = navigationController;
[self.window makeKeyAndVisible];
GlobalShare *getShare = [GlobalShare getGlobalShare];
if (!getShare.user) {
UserLoginViewController *loginVC = [[UserLoginViewController alloc]init ];
OverwriteNavigation * loginNaviagtionVC = [[OverwriteNavigation alloc] initWithRootViewController:loginVC];
[loginNaviagtionVC setNavigationBarHidden:YES];
[self.window.rootViewController presentViewController:loginNaviagtionVC animated:YES completion:^{
}];
}
当网络数据 返回 "<null>" 如何判断?
//图片
if (![attributes[@"image"] isEqual:[NSNull null]]) {
self.imageUrl = attributes[@"image"];
}else{
self.imageUrl = @"";
}