loadNibName 方法太慢 - 如何让它更快?

问题描述

我有一个滚动视图，其中包含大约 40-50 个不同类型的对象.对象的类型是在对象位置的函数中定义的(例如，如果是滚动视图中的第 5 个对象-> 是 Object1，如果它是滚动视图中的第 11 个对象-> 它是 Object2 类型等).使用 for 我正在验证数组的每个元素，然后使用以下方法将它们放入滚动视图中:

I have a scroll view, which contains about 40-50 objects of different types. The object's types are defined in function of the object's location (for ex. if is the 5th object in the scroll view-> is's Object1, if it is the 11th object in the scroll view -> it's Object2 type etc.). With a for I am verifying each element of an array, and then putting them into the scroll view, with this method:

for (int i = 0; i < [myArray count]; i++){

 if (i < 10){
        NSArray *xib = [[NSBundle mainBundle] loadNibNamed:@"Class1" owner:nil options:nil];
        for (NSObject *obj in xib){
            if ([obj isKindOfClass:[Class1 class]]){
                classObject = (Class1 *)obj;
                break;
            }
        }
 } else if (i > 10 && i < 20){
        NSArray *xib = [[NSBundle mainBundle] loadNibNamed:@"Class2" owner:nil options:nil];
        for (NSObject *obj in xib){
            if ([obj isKindOfClass:[Class2 class]]){
                classObject = (Class2 *)obj;
                break;
            }
        }
      }
[scrollview addSubview:classObject];
}

我的问题是，它加载非常缓慢.我该怎么做才能让它更快?

My problem is, that it loads very slowly. What can I do to make it quicker?

推荐答案

如果你正在为 IOS4+ 编程，你可以使用 UINib 类.它将加载缓存的对象并在每次需要时创建一个副本.请参阅 这篇博文.

If you are programming for IOS4+, you can use the UINib class instead. It will load a cached objects and create a copy each time needed. See this blog post.