UITextField

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  //创建      UITextField*textfield = [[UITextField             alloc]initWithFrame:CGRectMake(20,20,200,40)];    [self.window addSubview:self.myTextField];       //设置背景颜色    self.myTextField.backgroundColor = [UIColor clearColor];       //设置输入框样式    self.myTextField.borderStyle = UITextBorderStyleRoundedRect;       //密文输入    self.myTextField.secureTextEntry = YES;       //设置占位提示符    self.myTextField.placeholder = @"请输入";       //设置输入框删除按钮    self.myTextField.clearButtonMode = UITextFieldViewModeAlways;       //设置键盘类型    self.myTextField.keyboardType = UIKeyboardTypeNumberPad;/******按按钮键盘隐藏*********************************/  //创建按钮    UIButton *Button = [UIButton buttonWithType:UIButtonTypeCustom];    [self.window addSubview:Button];    Button.frame = CGRectMake(20, 80, 100, 30);    Button.backgroundColor = [UIColor cyanColor];    [Button addTarget:self action:@selector(buttonAction:) forControlEvents:UIControlEventTouchUpInside];-(void) buttonAction:(UIButton *)b{    [self.myTextField resignFirstResponder];    //取消第一响应者}/******************************************************//******按return键盘隐藏*********************************/1.签UITextFieldDelegate协议@interface AppDelegate : UIResponder <UIApplicationDelegate,UITextFieldDelegate>2.成为代理人哪个输入框成为代理人哪个输入框有此功能 self.myTextField.delegate = self;3.实现协议里的方法//点击return建的时候被触发通用，一个就可以给所有输入框用- (BOOL)textFieldShouldReturn:(UITextField *)textField{    [self.myTextField resignFirstResponder];    return YES;}/******************************************************//******按空白处键盘隐藏*********************************/ //按空白处键盘回收    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(backgroundTap:)];    [self.view addGestureRecognizer:tap];//按空白处键盘回收调用的方法- (IBAction)backgroundTap:(id)sender {    [self.studentDetailV.tf1  resignFirstResponder];    [self.studentDetailV.tf2  resignFirstResponder];    [self.studentDetailV.tf3  resignFirstResponder];    [self.studentDetailV.tf4  resignFirstResponder];    [self.studentDetailV.tf5  resignFirstResponder];   }/******************************************************/
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