图像保存后 iOS CPU% 保持高位
我有一个应用程序，显示我保存到应用程序的图像的缩略图，然后用户点击缩略图，他们会看到可以浏览的全尺寸图像（类似于照片应用程序）
我注意到的问题是，当我从 UIImagePicker 添加图像，然后再次点击缩略图，CPU 会跳至 140-150%（或更高）并保持在那里。
仅当我通过选择器将新图像保存到文档目录时，我才能每次复制此内容。
我正在使用活动监视器来查看 CPU%。我很好奇是否其他人也遇到过类似的情况，或者对导致这种情况的原因有任何想法。这可能只是我对活动监视器仪器的误解。
感谢您抽出时间。
I have an app that shows thumbnails of images that I save to app, then the user taps on a thumbnail they see a full size image that they can flick through (similar to the photos app)
My issue, that I noticed is that when I add images from a UIImagePicker, then tap on a thumbnail again, the CPU jumps up to 140-150% (or higher) and stays there.
I am able to replicate this every time only when I save a new image to the documents directory via the picker.
I was using the Activity Monitor to view the CPU%. I am curious if anyone else ever had a similar situation, or have any ideas as to what can cause this. This can possibly just my misinterpretation of the Activity Monitor Instrument.
Thank you for your time.
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事实证明，这是我用来保存图像的 NSInitationOperation。当我删除它时，我在所有设备上的性能都大大提高了。
我不知道为什么会出现这种情况，但删除它有帮助。谢谢大家的评论。它已经追查这个问题一段时间了，直到我确信这是一个内存问题。我必须阅读有关 NSInitationOperation 的更多内容才能了解我的根本问题是什么。
Turns out, it was the NSInvocationOperation I was using to save my images. The moment I removed that, my performance on all devices drastically improved.
I do not know why this is the case however, but removing it helped. Thank you all for your comments. It was chasing down this issue for a while, to the point where I was certain it was a memory issue. I must read more on the NSInvocationOperation to understand what my underlying issue was.