IPad使用UIModalPresentationFormSheet时隐藏键盘

IPad使用UIModalPresentationFormSheet时隐藏键盘

普通的做法resignFirstResponder在UIModalPresentationFormSheet的时候不起效
加上如下代码：

[passwordField resignFirstResponder];

@try

{

Class UIKeyboardImpl = NSClassFromString(@"UIKeyboardImpl");

id activeInstance = [UIKeyboardImpl performSelector:@selector(activeInstance)];

[activeInstance performSelector:@selector(dismissKeyboard)];

}

@catch (NSException *exception)

{

NSLog(@"%@", exception);

}