设置一个图片水平居中,位于屏幕的最底层。好像只要设置y坐标为screen_height - image_height就可以。
UIImage *img = [UIImage imageNamed:@"my-image.png"];
UIImageView *imgView = [[UIImageView alloc]initWithImage:img];
imgView.frame = CGRectMake(0, 0, img.size.width / 2, img.size.height / 2);
CGRect screenBounds = [[UIScreen mainScreen] bounds];
CGFloat screenScale = [[UIScreen mainScreen] scale];
CGSize screenSize = CGSizeMake(screenBounds.size.width * screenScale, screenBounds.size.height * screenScale);
CGRect frame = imgView.frame;
frame.origin.x = 0;
frame.origin.y = screenSize.height - img.size.height;
imgView.frame = frame;
[self.view addSubview:imgView];
但不知为什么没实现? 0,0 是屏幕的左上角。所以screen_height - image_height应该对啊,请前辈解答。不胜感激