在以创建的应用中点file——>new——>file——>Object-c class
class自己取 ,subclass选uiviewcontroller,不勾选with xib for user interface 创建一个uiviewcontroller
在新建的文件中:
.h
{
UIWindow *window;
}
.m
加入-(void)applicationDidFinishLaunching:(UIApplication *)application {
window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
window.backgroundColor = [UIColor whiteColor];
[window makeKeyAndVisible];
}
运行就可以可