UI自定义视图

将label和textField写成一个view

新建一个UIView子类

#import <UIKit/UIKit.h>

@interface LTView : UIView
{
    //  写在实例变量里面外界不能访问
    UILabel *_label;           //  标签
    UITextField *_textField;   //  输入框
}
//  外界可访问
@property (nonatomic, copy) NSString *labelText;  //  标签的文字
@property (nonatomic, retain) UIColor *lableTextColor;
@property (nonatomic, copy) NSString *textFieldText;
@property (nonatomic, assign, getter = isSecureTextEntry) BOOL secureTextEntry;  //  设置是否以圆点方式显示
@property (nonatomic, assign) id<UITextFieldDelegate> delegate;

#pragma mark 初始化方法
- (instancetype)initWithFrame:(CGRect)frame withLabelText:(NSString *)text;

@end

实现部分

#import "LTView.h"

@implementation LTView

- (void)dealloc
{
    [_label release];
    [_textField release];
    
    [super dealloc];
}

#pragma mark 重写initWithFrame:
- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
//        self.backgroundColor = [UIColor cyanColor];
        
        //  添加Label
        _label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, frame.size.width / 3, frame.size.height)];
//        _label.backgroundColor = [UIColor grayColor];
        [self addSubview:_label];
        
        //  添加TextField
        _textField = [[UITextField alloc] initWithFrame:CGRectMake(frame.size.width / 3, 0, frame.size.width / 3 * 2, frame.size.height)];
        _textField.borderStyle = UITextBorderStyleRoundedRect;
        [self addSubview:_textField];
    }
    return self;
}

#pragma mark 重写setter和getter方法
- (void)setLabelText:(NSString *)labelText
{
    _label.text = labelText;
}
- (NSString *)labelText
{
    return _label.text;
}

- (void)setLableTextColor:(UIColor *)lableTextColor
{
    _label.textColor = lableTextColor;
}

- (void)setTextFieldText:(NSString *)textFieldText
{
    _textField.text = textFieldText;
}
- (NSString *)textFieldText
{
    return _textField.text;
}

- (void)setSecureTextEntry:(BOOL)secureTextEntry
{
    _textField.secureTextEntry = secureTextEntry;
}
- (BOOL)isSecureTextEntry
{
    return _textField.secureTextEntry;
}

- (void)setDelegate:(id<UITextFieldDelegate>)delegate
{
    _textField.delegate = delegate;
}

#pragma mark 实现初始化方法
- (instancetype)initWithFrame:(CGRect)frame withLabelText:(NSString *)text
{
    self = [self initWithFrame:frame];
    if (self) {
        _label.text = text;
    }
    return self;
}

@end

AppDelegate.m中

LTView *view = [[LTView alloc] initWithFrame:CGRectMake(30, 50, 200, 30) withLabelText:@"用户名"];
    view.delegate = self;
//    view.SecureTextEntry = YES;
    [self.window addSubview:view];
    [view release];
    
    LTView *view2 = [[LTView alloc] initWithFrame:CGRectMake(30, 100, 200, 30) withLabelText:@"密码"];
    view2.delegate = self;
    view2.SecureTextEntry = YES;
    [self.window addSubview:view2];
    [view2 release];