Ios5 为什么使用UIScrollView'；在iOS 4.3中，s滚动会触发layoutSubViews方法，但在5.0&；在上面

我定制了UIView来创建自定义UI组件

视图的层次结构是这样的

----自定义UIView

----------------UIScrollView

-(id)initWithFrame:(CGRect)frame{

self = [super initWithFrame:frame];

if(self){

//Allocation and Initialization of ScrollView
//...
[super addSubView:scrollView];

}
return self;
}

- (void)layoutSubviews {

    DLog(@"%@",[NSThread callStackSymbols]);
    [super layoutSubviews];

    [self reloadData];

}

//This method can be used to reload the entire control
-(void)reloadData{
//Reload the subviews of control
}

-----------------------------ScrollView中的子视图

-(id)initWithFrame:(CGRect)frame{

self = [super initWithFrame:frame];

if(self){

//Allocation and Initialization of ScrollView
//...
[super addSubView:scrollView];

}
return self;
}

- (void)layoutSubviews {

    DLog(@"%@",[NSThread callStackSymbols]);
    [super layoutSubviews];

    [self reloadData];

}

//This method can be used to reload the entire control
-(void)reloadData{
//Reload the subviews of control
}

每当滚动滚动视图时，都会在iOS版本4.3中调用layoutSubviews方法。但在4.3（5.0，6.0）以上的版本中，不会调用此事件处理程序

在我的用例中，我不希望调用LayoutSubView

---

如何确保在滚动时有一个不会触发layoutsubviews方法的滚动视图？

我提出的解决方案如下：

在自定义视图的顶部添加容器UIView（供参考ScrollViewHolder）

然后在视图滚动视图保持架上添加UIScrollView

----自定义UIView

----------------另一种观点

-------------------------------UIScrollView

-(id)initWithFrame:(CGRect)frame{

self = [super initWithFrame:frame];

if(self){

//Allocation and Initialization of ScrollView
//...
[super addSubView:scrollView];

}
return self;
}

- (void)layoutSubviews {

    DLog(@"%@",[NSThread callStackSymbols]);
    [super layoutSubviews];

    [self reloadData];

}

//This method can be used to reload the entire control
-(void)reloadData{
//Reload the subviews of control
}

--------------------------------------------ScrollView中的子视图

-(id)initWithFrame:(CGRect)frame{

self = [super initWithFrame:frame];

if(self){

//Allocation and Initialization of ScrollView
//...
[super addSubView:scrollView];

}
return self;
}

- (void)layoutSubviews {

    DLog(@"%@",[NSThread callStackSymbols]);
    [super layoutSubviews];

    [self reloadData];

}

//This method can be used to reload the entire control
-(void)reloadData{
//Reload the subviews of control
}

init方法现在更改为以下内容：

-(id)initWithFrame:(CGRect)frame{

self = [super initWithFrame:frame];

if(self){

//Allocation and Initialization of Container View

[super addSubView:ScrollViewHolder];
//Allocation and Initialization of ScrollView
//...
[ScrollViewHolder addSubView:scrollView];

}
return self;
}