objective-c - 如何在开始时以最小比例设置滚动视图？

Question

我必须UIScrollView从 0.28 scale（当前刻度）开始设置。我怎样才能正确地做到这一点？

现在缩放我正在使用这种方法：

#pragma mark - UIScrollViewDelegate Methods

-(UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView {
return imageView;
}

-(void)scrollViewDidZoom:(UIScrollView *)scrollView {
[self centerScrollViewContent];
}

-(void)scrollViewDidEndZooming:(UIScrollView *)scrollView withView:(UIView *)view atScale:(float)scale {

}

- (void)centerScrollViewContent {
CGSize boundsSize = self.scrollView.bounds.size;
CGRect contentsFrame = imageView.frame;

if (contentsFrame.size.width < boundsSize.width) {
    contentsFrame.origin.x = (boundsSize.width - contentsFrame.size.width) / 2.0f;
} else {
    contentsFrame.origin.x = 0.0f;
}

if (contentsFrame.size.height < boundsSize.height) {
    contentsFrame.origin.y = (boundsSize.height - contentsFrame.size.height) / 2.0f;
} else {
    contentsFrame.origin.y = 0.0f;
}

imageView.frame = contentsFrame;
}

Answer 1

加载滚动视图内容后，您可以设置缩放比例：

self.scrollView.zoomScale = 0.28;