UIImageView的内存大小
我想知道 UIImageView 对象的内存大小，因为我需要显示一些大图像并且需要处理内存。我猜这是由图像属性决定的。但我不知道如何计算精算内存大小，下面是我编写的测试代码：
//1.jpg has a size of 4016X2657 and 2.1MB
NSData *imageData = [NSData dataWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"1" ofType:@"jpg"]];
NSLog(@"imageData:%d",[imageData length]);
控制台显示：
imageData:2070461
这正是 2.1MB 的大小。
但是，在我看来，UIImageView 应该知道显示图像的每个像素，换句话说，它应该具有以下内存： <代码> 4016*2657*4/1024/1024 = 40.7+MB 太大了，不知道iOS会不会做一些优化，而且文档里也找不到相关的。
谁能帮我看看 UIImageView 对象的确切内存大小是多少？
I'd like to know the memory size for a UIImageView object as I need to show some large image and I need to handle the memory. I guess it is decided by the image property. But I'm not sure how to calculate the actuarial memory size,and below is the code I write to test:
//1.jpg has a size of 4016X2657 and 2.1MB
NSData *imageData = [NSData dataWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"1" ofType:@"jpg"]];
NSLog(@"imageData:%d",[imageData length]);
The console shows:
imageData:2070461
This is exactly the size of 2.1MB.
However, in my opinion the UIImageViewshould know the each pixel to show the image and in other words it should have a memory of :
4016*2657*4/1024/1024 = 40.7+MB
It is so large and I don't know whether iOS will do some optimization or not.And I also can't find any relevant in the document.
Could anyone help me what is the exactly memory size of a UIImageView object?
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问题中对此进行了描述。内存是照片的精算大小，UIImage不会做优化。
It is described in the question. The memory is the actuarial size of the photo and UIImage will not do optimization.