iphone uiscrollview和uiimageview - 设置初始缩放 [英] iphone uiscrollview and uiimageview - setting initial zoom

问题描述

我使用以下代码将图像加载到滚动视图中。图像始终以100％变焦加载。有没有办法将其设置为加载到另一个缩放级别，比如说.37？

I use the following code to load an image into an scroll view. The image always loads at 100% zoom. Is there a way to set it to load to another zoom level, say .37?

我试过scrollView.zoomScale = .37但它似乎没有工作

I have tried scrollView.zoomScale = .37 but it didnt seem to work

UIImageView *tempImage = [[UIImageView alloc]initWithImage:[UIImage imageWithData:data]];
        self.imageView = tempImage;

        scrollView.contentSize = CGSizeMake(imageView.frame.size.width , imageView.frame.size.height);
        scrollView.maximumZoomScale = 1;
        scrollView.minimumZoomScale = .37;
        scrollView.clipsToBounds = YES;
        scrollView.delegate = self;

        [scrollView addSubview:imageView];

推荐答案

我想通了......我正在使用scrollView .zoomScale = 0.37;在我加载图像之前更改了代码并且它工作得很好。

I figured it out... I was using scrollView.zoomScale = 0.37; before I loaded the image changed code and it works great.

UIImageView *tempImage = [[UIImageView alloc]initWithImage:[UIImage imageWithData:data]];
self.imageView = tempImage;

scrollView.contentSize = CGSizeMake(imageView.frame.size.width , imageView.frame.size.height);
scrollView.maximumZoomScale = 1;
scrollView.minimumZoomScale = .37;
scrollView.clipsToBounds = YES;
scrollView.delegate = self;
[scrollView addSubview:imageView];
scrollView.zoomScale = .37;

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