UITextField用法

UITextField *tf &＃61; [[UITextField alloc] initWithFrame:CGRectMake(60, 180, 200, 35)];

    tf.tag &＃61; 101;

    tf.delegate &＃61; self; // 设置代理

    tf.textColor &＃61; [UIColor redColor];

    //提示用户输入的内容文本

    tf.placeholder &＃61; &＃64;"用来提示用户";

    //自适应调整字体大小&＃xff0c;默认为NO

    tf.adjustsFontSizeToFitWidth &＃61; YES;

    //用户编辑时是否Clean内容&＃xff0c;默认是NO

    tf.clearsOnBeginEditing &＃61; YES;

    //清除按钮的模式&＃xff0c;默认不出现

    tf.clearButtonMode &＃61; UITextFieldViewModeWhileEditing;

    //    tf.background &＃61; [UIImage imageNamed:&＃64;"navigation"];

    tf.borderStyle &＃61; UITextBorderStyleRoundedRect;//显示和android一样的框

     [tf becomeFirstResponder];//响应键盘事件

 // 自定义clear按钮

        UIView *view &＃61; [[UIView alloc] initWithFrame:CGRectMake(0, 0, 20, 20)];

        view.backgroundColor &＃61; [UIColor yellowColor];

        tf.rightView &＃61; view;

        [view release];

        tf.rightViewMode &＃61; UITextFieldViewModeUnlessEditing;

 // 自定义系统键盘

    UIView *csView &＃61; [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 200)];

    csView.backgroundColor &＃61; [UIColor yellowColor];

    tf.inputView &＃61; csView;

    [csView release];

 //系统键盘和自定义键盘共存

       tf.inputAccessoryView &＃61; csView1;

      //是否安全输入&＃xff0c;比如用户名&＃xff0c;密码

      tf.secureTextEntry &＃61; YES;

     //修改键盘类型

      tf.keyboardType &＃61; UIKeyboardTypeNumberPad;

    //修改返回类型

      tf.returnKeyType &＃61; UIReturnKeyDone;

    //自动大写类型

      tf.autocapitalizationType &＃61; UITextAutocapitalizationTypeNone;

    UITextField *tf &＃61; (UITextField *)[self.window viewWithTag:101];

    // 将键盘移除

    [tf resignFirstResponder];

代理方法&＃xff1a;

#pragma mark - TextField Delegate

//将要开始输入时调用&＃xff0c;就是键盘要显示时调用

- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField

{

    NSLog(&＃64;"textFieldShouldBeginEditing");

    return YES; // [textField becomeFirstResponder]; 

}

//键盘已经显示&＃xff0c;做好编辑准备时调用

- (void)textFieldDidBeginEditing:(UITextField *)textField

{

    NSLog(&＃64;"textFieldDidBeginEditing");

}

//将要输入结束时调用&＃xff0c;就是键盘将要离开时调用

- (BOOL)textFieldShouldEndEditing:(UITextField *)textField

{

    NSLog(&＃64;"textFieldShouldEndEditing");

    return YES; // [tf resignFirstResponder];

}

//键盘已经离开&＃xff0c;结束编辑时调用&＃xff0c;

- (void)textFieldDidEndEditing:(UITextField *)textField

{

    NSLog(&＃64;"textFieldDidEndEditing : %&＃64;", textField.text);

}

//文本改变监听

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string

{

    NSLog(&＃64;"shouldChangeCharactersInRange : %&＃64;", string);

    return YES;

}

//清除文字按钮点击事件

- (BOOL)textFieldShouldClear:(UITextField *)textField

{

    NSLog(&＃64;"textFieldShouldClear");

    return YES;

}

//键盘上的return按钮事件

- (BOOL)textFieldShouldReturn:(UITextField *)textField

{

    //隐藏输入键盘

    [textField resignFirstResponder];

    return YES;

}