iOS-UIImageView

    //读取图片文件

   UIImage *image  = [UIImageimageNamed:@"Baseball.png"];

    //UIImageView 创建

   UIImageView *imageView = [[UIImageViewalloc] initWithImage:image];

    //设置位置及自动调节参数

    imageView.center =self.view.center;

    imageView.autoresizingMask =UIViewAutoresizingFlexibleBottomMargin|UIViewAutoresizingFlexibleTopMargin;

    //将图片放到self.view上

    [self.viewaddSubview:imageView];