AppleScriptObjC中的NSImage release（） [英] NSImage release() in AppleScriptObjC

问题描述

我正在创建一个表格视图，每行显示小图像。 数据源为表的每一行保存一个图像。我通过将 img设置为NSImage（）的alloc（）的initWithContentsOfFile_（thePath）创建图像。接下来，通过将imageView的图像设置为img ，以较大的浏览器视图显示选定行的图像。问题是我的内存不足，因为我对两个视图使用相同的表示形式。 （图像约为500x400）。
我试图找出如何从较大的版本制作较小的版本，然后发布较大的图像。

I'm creating a Table View with small images displayed in each row. The data source holds an image for each row of an table. I create images thru set img to NSImage()'s alloc()'s initWithContentsOfFile_(thePath). Next I display the image of selected row in bigger, browser view thru set imageView's image to img. Problem is that I'm running out of memory because I use the same representation for both views. (Images are around 500x400). I'm trying to figure out how to make a smaller version from bigger one and then release a bigger image.

我从发布图像开始。.
我尝试了 img的release（），但没有工作了。除了垃圾回收，ARC和内存管理，我找不到有关该主题的任何信息。一个>。我已经在 XCode 中启用了 Objective-C自动引用计数，但可能不适用于Applescript部分一个交易。有没有办法在纯ApplescriptObjC中实现它？

I started from releasing an image.. I have tried img's release() but it not worked. I couldn't find any info on that topic besides Garbage Collection, ARC, and managing memory. I have turned-on Objective-C Automatic Reference Counting in XCode but probably it doesn't applies to Applescript part of a deal. Is there an way to achieve it in pure ApplescriptObjC?

推荐答案

尝试以下代码（调整变量名和UI控件属性）：

Try this code (adjusting for your variable names and UI control properties):

set curImage to current application's NSImage's alloc()'s initWithContentsOfFile:thePath

-- create a smaller image

set newImage to current application's NSImage's alloc()'s initWithSize:{48, 48}

newImage's lockFocus()

curImage's drawInRect:{{0,0}, {48, 48}} fromRect:{{0,0},{0,0}} operation:2 fraction:1.0

newImage's unlockFocus()

imgArtwork's setImage:newImage 

set curImage to missing value -- release large image

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