UITextField

• 常用属性

  • 边框样式
    @property (nonatomic) UITextBorderStyle borderStyle;
  • 背景图（设置了边框样式，背景图就没有了）
    @property (nullable, nonatomic,strong) UIImage *background;
  • 占位符
    @property (nonatomic,copy) NSString *placeholder;
  • 文本
    @property (nonaatomic,copy) NSString *text;
  • 文本字体颜色
    @property (nonatomic,strong) UIColor *textColor;
  • 文本字体
    @property (nonatomic,strong) UIFont *font;
  • 文本对齐方式
    @property (nonatomic,assign) NSTextAlignment textAlignment;
  • 代理（文本框编辑操作均由代理完成）
    @property (nonatomic,weak) id<UITextFieldDelegate> delegate;
    ＊键盘样式
    @property (nonatomic,assign) UIKeyboardType keyboardType;
@property (nonatomic,assign) UIKeyboardAppearance keyboardAppearance;
  • 返回键样式
    @property (nonatomic,assign) UIReturnKeyType returnKeyType;
  • 密码
    @property(nonatomic,getter=isSecureTextEntry)BOOL secureTextEntry;
  • 清除按钮模式（无论何种模式，文本框中有文字的时候才会显示）
    @property (nonatomic,assign) UITextFieldViewMode clearMode;
  • leftView (需要设置leftViewMode)
    @property (nonatomic,strong) UIView *leftView;

  • leftViewMode
    @property(nonatomic) UITextFieldViewMode leftViewMode;

    • 示例代码

      1.UIImageView *leftView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 30, 30)];
      2.leftView.image = [UIImage imageNamed:@"pied_piper_2"];
      3.textField.leftView = leftView;
      4.textField.leftViewMode = UITextFieldViewModeAlways;
      5.
      

      

  • rightView(需要设置rightViewMode,显示了rightView之后清除按钮将不会显示)
    @property (nonatomic,strong) UIView *rightView;

  • rightViewMode
    @property(nonatomic) UITextFieldViewMode rightViewMode;

    • 示例代码

      1.UIImageView *rightView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 30, 30)];
      2.rightView.image = [UIImage imageNamed:@"crystal_ball"];
      3.textField.rightView = rightView;
      4.textField.rightViewMode = UITextFieldViewModeAlways;
      5.
      

      

  ---

• 代理方法

1.
2.// 清除按钮回调
3.-(BOOL)textFieldShouldClear:(UITextField *)textField{
4.    return YES;
5.}
6.
7.// 返回键回调
8.-(BOOL)textFieldShouldReturn:(UITextField *)textField{
9.    return YES;
10.}
11.
12.-(BOOL)textFieldShouldBeginEditing:(UITextField *)textField{
13.    // 此方法是在对象申请注册成为firstresponder时(也就是[textField becomeFirstResponder]时)调用
14.    return YES;
15.}
16.
17.-(void)textFieldDidBeginEditing:(UITextField *)textField{
18.    // 此方法实在对象注册成为 firstresponder 后调用
19.}
20.
21.-(BOOL)textFieldShouldEndEditing:(UITextField *)textField{
22.    // 此方法是在 [textField resignFirstResponder] 时调用
23.    return YES;
24.}
25.
26.-(void)textFieldDidEndEditing:(UITextField *)textField{
27.    // 此方法是在 textFiled 辞去 FirstResponder 后 调用
28.}
29.
30.-(BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string{
31.    // 获取实时输入的内容
32.    // 此方法是在键盘点击输入 string 并且在将 string 追加到文本框之前调用
33.    // 参数 string 文本框的内容
34.    // range.location 表示光标的位置.光标永远在文本内容的最末尾(在不主动移动光标的情况下)
35.    return YES;
36.}
37.
38.