为什么我得到一个＆QUOT;自动布局仍然需要执行-layoutSubviews＆QUOT后;每一个错误，现在我的应用程序启动的时间？ [英] Why am I getting a "Auto Layout still required after executing -layoutSubviews" error every time my app launches now?

问题描述

自从我加入了以下code，每次我的应用程序打开该的UITableViewController 崩溃：

Since I added the following code, every time my app opens this UITableViewController it crashes:

 self.noArticlesView = [[UIView alloc] init];
 self.noArticlesView.translatesAutoresizingMaskIntoConstraints = NO;
 self.noArticlesView.backgroundColor = [UIColor colorWithRed:0.961 green:0.961 blue:0.961 alpha:1];

 [self.view addSubview:self.noArticlesView];

 [self.view addConstraint:[NSLayoutConstraint constraintWithItem:self.noArticlesView attribute:NSLayoutAttributeTop relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeTop multiplier:1.0 constant:0.0]];
 [self.view addConstraint:[NSLayoutConstraint constraintWithItem:self.noArticlesView attribute:NSLayoutAttributeBottom relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeBottom multiplier:1.0 constant:0.0]];
 [self.view addConstraint:[NSLayoutConstraint constraintWithItem:self.noArticlesView attribute:NSLayoutAttributeLeading relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeLeft multiplier:1.0 constant:0.0]];
 [self.view addConstraint:[NSLayoutConstraint constraintWithItem:self.noArticlesView attribute:NSLayoutAttributeTrailing relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeRight multiplier:1.0 constant:0.0]];    

和它给了我这个错误：

的 * 的终止应用程序由于未捕获的异常'NSInternalInconsistencyException，理由是：自动布局仍在执行-layoutSubviews后需要。 UITableView中的实现-layoutSubviews的需要调用超。

* Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Auto Layout still required after executing -layoutSubviews. UITableView's implementation of -layoutSubviews needs to call super.'

这到底我做错了什么？我称之为的code的tableView：numberOfRowsInSection：当有0行

What on earth am I doing wrong? I call that code in tableView:numberOfRowsInSection: when there's 0 rows.

推荐答案

我继承的UIScrollView并收到同样的错误消息在iOS 7（但不是8）。

I was subclassing UIScrollView and received the same error message on iOS 7 (but not 8).

我重写layoutSubviews类似如下的方式：

I was overriding layoutSubviews in a manner similar to the following:

- (void)layoutSubviews {
    [super layoutSubviews];
    // code to scroll the view
}

我通过移动电话到超的layoutSubviews是在方法的最后一件事解决了这个问题：

I resolved the issue by moving the call to super's layoutSubviews to be the last thing in the method:

- (void)layoutSubviews {
    // code to scroll the view
    [super layoutSubviews];
}

这篇关于为什么我得到一个＆QUOT;自动布局仍然需要执行-layoutSubviews＆QUOT后;每一个错误，现在我的应用程序启动的时间？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！