需要一份NSMutableArray的复制,所以我用mutableCopy方法。但是我发现如果修改了复制品中的数据,原版也会跟着改变。不知道其他创建NSMutableArray的方法是什么?
delegate = (AppDelegate *)[[UIApplication sharedApplication]delegate];
self.mainImagesArray = [[NSMutableArray alloc]initWithArray:[delegate.arrayForCarCaptureImages mutableCopy]];
修改代码:
UIImage *filteredImage =[[[[self.mainImagesArray objectAtIndex:i]valueForKey:valueVheck] objectAtIndex:j] copy];
filteredImage =[filteredImage brightness:(1+sliderValue-0.5)];
[[[self.mainImagesArray objectAtIndex:i]valueForKey:valueVheck]removeObjectAtIndex:j];
[[[self.mainImagesArray objectAtIndex:i] valueForKey:valueVheck]insertObject:filteredImage atIndex:j];
一旦执行arrayForCarCaptureImages
也会自动改变。