UITextField

textField的创建

    self.textField = [[UITextField alloc] initWithFrame:CGRectMake(100, 100, 180, 30)];    self.textField.backgroundColor = [UIColor whiteColor];    self.textField.layer.cornerRadius = 8;    self.textField.layer.borderColor = [[UIColor lightGrayColor]CGColor];    // 设置textField内容    self.textField.text = @"123";    self.textField.placeholder = @" 请输入信息";    [self.view addSubview:self.textField];    [self.textField release];    self.textField.delegate = self;

textField的一些独特属性

    // 把输入内容以圆点显示    self.textField.secureTextEntry = YES;    // 修改return键的样式    self.textField.returnKeyType = UIReturnKeyDone;    // 清除按钮    self.textField.clearButtonMode = UITextFieldViewModeAlways;

textField的协议(UITextFieldDelegate)

// 开始编辑时触发- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField

// 已经开始编辑时触发- (void)textFieldDidBeginEditing:(UITextField *)textField; 

// 结束时触发- (BOOL)textFieldShouldEndEditing:(UITextField *)textField;

// 已经结束时触发- (void)textFieldDidEndEditing:(UITextField *)textField; 

// 实时监控输入内容, 但输出比当前输入内容少一位,textField.text和string拼接起来才是当前textField中的内容- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string;