IOS开发之UIView总结1

 太长了，请看 http://blog.csdn.net/xdrt81y/article/details/9128695

performSelector:
performSelector:withObject:
performSelector:withObject:withObject:

 实际调用

 

[self performSelector:@selector(displayViews) withObject:nil afterDelay:1.0f];

  有三个方法分别是

 

//父视图
[self.view superview]
//所有子视图
 [self.view subviews]
//自身的window
 self.view.window

循环一个视图下面所有视图的方法

 

NSArray *allSubviews(UIView *aView)
{
    NSArray *results = [aView subviews];
    for (UIView *eachView in [aView subviews])
    {
        NSArray *riz = allSubviews(eachView);
        if (riz) {
            results = [results arrayByAddingObjectsFromArray:riz];
        }
    }
    return results;
}

循环返回一个APPLICATION里面所有的VIEW

 

// Return all views throughout the application
NSArray *allApplicationViews()
{
    NSArray *results = [[UIApplication sharedApplication] windows];
    for (UIWindow *window in [[UIApplication sharedApplication] windows])
    {
        NSArray *riz = allSubviews(window);
        if (riz) results = [results arrayByAddingObjectsFromArray: riz];
    }
    return results;
}

 找出所有的父视图

 

// Return an array of parent views from the window down to the view
NSArray *pathToView(UIView *aView)
{
    NSMutableArray *array = [NSMutableArray arrayWithObject:aView];
    UIView *view = aView;
    UIWindow *window = aView.window;
    while (view != window)
    {
        view = [view superview];
        [array insertObject:view atIndex:0];
    }
    return array;
}