如何获取存储在iPhone应用程序的文件夹中的png文件的尺寸？
[英]How to get dimension of png file stored in documents folder of iPhone application?
问题描述
I am facing a problem, hope some one will help me to sort it out. 
我正面临一个问题，希望有人帮我解决问题。 I am working on an application that saves png files in the documents folder of the iPhone application, and also user can view the files that were saved. 我正在开发一个将png文件保存在iPhone应用程序的文档文件夹中的应用程序，用户也可以查看保存的文件。 So, i want to know is there any way to find out the dimension of the file being displayed? 所以，我想知道有没有办法找出正在显示的文件的维度？ so that, if image dimension is bigger than my imageView then i can make them scroll, currently image is shrink. 这样，如果图像尺寸大于我的imageView，那么我可以让它们滚动，目前图像缩小。
2 个解决方案
解决方案1
2 已采纳 2011-11-13 17:39:25
this may help... 这可能有帮助......
ImageIO framework (CGImageSource...)
similar Q to accessing UIImage properties without loading in memory the image 类似的Q 访问UIImage属性而不在内存中加载图像
解决方案2
1 2011-11-13 17:37:46
Create a UIImage from the file, using imageWithContentsOfFile: . 使用imageWithContentsOfFile:从文件创建一个UIImage。 The size of the image is held in the size property of your new UIImage object. 图像的size保存在新UIImage对象的size属性中。
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