IOS获取文本焦点主动召唤出键盘(becomeFirstResponder)and失去焦点（退下键盘）...

 

 

主动召唤出键盘

- (void)viewDidAppear:(BOOL)animated
{// 3.主动召唤出键盘
[self.nameField becomeFirstResponder];// [self.nameField resignFirstResponder];
}

 退出键盘

- (void)viewDidAppear:(BOOL)animated
{//退下键盘 方式1
[self.nameField resignFirstResponder];//方式 2 严谨的做法&＃xff08;常用方式 &＃xff09;
[ self.view endEditing:YES];
}