我UITextField在故事板中创建.并且还增加了它的约束.我想在UITextField的左侧搜索图标.添加搜索图标的代码如下:
self.searchTextField.leftView = searchIconImage;
self.searchTextField.leftViewMode = UITextFieldViewModeAlways;
[self.searchTextField addTarget:self
action:@selector(textFieldDidChange:)
forControlEvents:UIControlEventEditingChanged];
我的应用程序在iOS8上工作正常,在iOS7上崩溃.错误如下:
断言失败 - [UITextField layoutSublayersOfLayer:],/ SourceCache/UIKit/UIKit-2935.138/UIView.m:8794 2014-11-05 12:54:33.377 WattUp [1722:60b]由于未捕获的异常'NSInternalInconsistencyException'而终止应用程序,原因:'执行-layoutSubviews后仍需要自动布局.UITextField的-layoutSubviews实现需要调用super.