@interface LTView : UIView
//1.是否采用安全模式
- (void)setSecureEntry:(BOOL)secureEntry;
//2.设置键盘的类型
- (void)setKeyBoardType:(UIKeyboardType)keyBoardType;
//3.设置textField代理
- (void)setDelegate:(id<UITextFieldDelegate>)delegate;
//4.获取输入框中输入的文字
- (NSString *)text;

//自定义初始化方法,来处理LTView之间的差异性
//1.LTView的frame, 2.UILabel上显示的文字 . 3.UITextField占位文字. 4.默认显示的文字.
- (id)initWithFrame:(CGRect)frame labelText:(NSString *)labelText placeholder:(NSString *)placeholder textFieldText:(NSString *)textFieldText;
@end

LTView.h中的接口文件.

@interface LTView ()
{
    UILabel *_desLabel; //左边的label
    UITextField *_textField; //右边的textField
}
@end
@implementation LTView
- (id)initWithFrame:(CGRect)frame labelText:(NSString *)labelText placeholder:(NSString *)placeholder textFieldText:(NSString *)textFieldText
{
    self = [self initWithFrame:frame];
    if (self) {
        //initialization code here..
        _desLabel.text = labelText;
        _textField.placeholder = placeholder;
        _textField.text = textFieldText;
    }
    return self;
}
/**
 *  当系统提供的控件满足不了我们的需求时,我们就需要组合系统控件,封装成自己的控件.
    自定义视图的步骤:
    1.创建类 继承自UIView.
    2.封装系统控件.(内部完成组合控件的创建过程)
    3.使用自定义控件创建对象.
    封装的过程:封装内部实现,提供外界访问的接口.先封装公共部分,然后处理差异.
 *
 */
- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        //LTView内部封装了 左边一个UILabel,右边一个UITextField.
        // Initialization code
        //初始化时完成内部封装控件的创建以及添加操作.
        CGFloat width = frame.size.width;
        CGFloat height = frame.size.height;
        //UILabel
        _desLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 0.3 * width, height)];
        _desLabel.font = [UIFont systemFontOfSize:15];
        _desLabel.textAlignment = NSTextAlignmentRight;
        [self addSubview:_desLabel];
        [_desLabel release];
        //UITextField
        _textField = [[UITextField alloc] initWithFrame:CGRectMake(0.4 * width, 0, 0.6 * width, height)];
        _textField.borderStyle = UITextBorderStyleRoundedRect;
        UIButton *btn = [UIButton buttonWithType:UIButtonTypeSystem];
        [btn setTitle:@"完成" forState:UIControlStateNormal];
        [btn addTarget:self action:@selector(done:) forControlEvents:UIControlEventTouchUpInside];
        btn.frame = CGRectMake(320 - 60, 0, 40, 40);
        UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 40)];
        [view addSubview:btn];
        view.backgroundColor = [UIColor whiteColor];
        _textField.inputAccessoryView = view;
        [view release];
        _textField.autocorrectionType = UITextAutocorrectionTypeNo;
        [self addSubview:_textField];
        [_textField release];
    }
    return self;
}
- (void)done:(UIButton *)btn
{
    [_textField resignFirstResponder];
}
//1.是否采用安全模式
- (void)setSecureEntry:(BOOL)secureEntry
{
    _textField.secureTextEntry = secureEntry;
}
//2.设置键盘的类型
- (void)setKeyBoardType:(UIKeyboardType)keyBoardType
{
    _textField.keyboardType = keyBoardType;
}
//3.设置textField代理
- (void)setDelegate:(id<UITextFieldDelegate>)delegate
{
    _textField.delegate = delegate;
}
//4.获取输入框中输入的文字
- (NSString *)text
{
    return _textField.text;
}

/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect
{
    // Drawing code
}
*/
@end

通过以上两步,可以封装左边一个UILable,和右边一个UITextField视图.