iOS 自定义一个视图作为根视图

#import "myView.h"

//使用这个myview来代替控制器自带的view
@property(nonatomic,retain)myView *myview;

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
        
        //将myView初始化
        self.myview=[[[myView alloc]initWithFrame:[UIScreen mainScreen].bounds] autorelease];
        
        
    }
    return self;

}

//加载视图//重写的,使用自己写的view.不要系统自带的
-(void)loadView
{
      //指向自己创建的myview
    self.view=self.myview;
}