更新Readme，准备完善功能

无奈

CodeTextDemo.xcodeproj/project.pbxproj

@@ -16,6 +16,7 @@
 		87BA7284215B3E3B00A6911D /* HWTFCodeBView.m in Sources */ = {isa = PBXBuildFile; fileRef = 87BA727E215B3E3B00A6911D /* HWTFCodeBView.m */; };
 		87BA7285215B3E3B00A6911D /* HWTFCodeView.m in Sources */ = {isa = PBXBuildFile; fileRef = 87BA727F215B3E3B00A6911D /* HWTFCodeView.m */; };
 		87BA7286215B3E3B00A6911D /* HWTextCodeView.m in Sources */ = {isa = PBXBuildFile; fileRef = 87BA7280215B3E3B00A6911D /* HWTextCodeView.m */; };
+		87DCFBBE21C26B2100D4C08D /* HWTFCursorView.m in Sources */ = {isa = PBXBuildFile; fileRef = 87DCFBBD21C26B2100D4C08D /* HWTFCursorView.m */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXFileReference section */
@@ -35,6 +36,8 @@
 		87BA7281215B3E3B00A6911D /* HWTFCodeBView.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = HWTFCodeBView.h; sourceTree = "<group>"; };
 		87BA7282215B3E3B00A6911D /* HWTextCodeView.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = HWTextCodeView.h; sourceTree = "<group>"; };
 		87BA7283215B3E3B00A6911D /* HWTFCodeView.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = HWTFCodeView.h; sourceTree = "<group>"; };
+		87DCFBBC21C26B2100D4C08D /* HWTFCursorView.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = HWTFCursorView.h; sourceTree = "<group>"; };
+		87DCFBBD21C26B2100D4C08D /* HWTFCursorView.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = HWTFCursorView.m; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -90,6 +93,8 @@
 				87BA727E215B3E3B00A6911D /* HWTFCodeBView.m */,
 				87BA7283215B3E3B00A6911D /* HWTFCodeView.h */,
 				87BA727F215B3E3B00A6911D /* HWTFCodeView.m */,
+				87DCFBBC21C26B2100D4C08D /* HWTFCursorView.h */,
+				87DCFBBD21C26B2100D4C08D /* HWTFCursorView.m */,
 			);
 			path = CodeTextView;
 			sourceTree = "<group>";
@@ -168,6 +173,7 @@
 				87BA726C215B3DC200A6911D /* ViewController.m in Sources */,
 				87BA7277215B3DC300A6911D /* main.m in Sources */,
 				87BA7269215B3DC200A6911D /* AppDelegate.m in Sources */,
+				87DCFBBE21C26B2100D4C08D /* HWTFCursorView.m in Sources */,
 				87BA7284215B3E3B00A6911D /* HWTFCodeBView.m in Sources */,
 				87BA7286215B3E3B00A6911D /* HWTextCodeView.m in Sources */,
 			);

CodeTextDemo/CodeTextView/HWTFCursorView.h

@@ -0,0 +1,51 @@
+//
+//  HWTFCursorView.h
+//  CodeTextDemo
+//
+//  Created by 侯万 on 2018/12/13.
+//  Copyright © 2018 小侯爷. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+
+/**
+ 基础版 - 下划线 - 有光标
+ */
+@interface HWTFCursorView : UIView
+
+
+// ----------------------------Data----------------------------
+/// 当前输入的内容
+@property (nonatomic, copy, readonly) NSString *code;
+
+
+// ----------------------------Method----------------------------
+
+- (instancetype)initWithCount:(NSInteger)count margin:(CGFloat)margin;
+
+- (instancetype)init UNAVAILABLE_ATTRIBUTE;
++ (instancetype)new UNAVAILABLE_ATTRIBUTE;
+
+@end
+
+
+
+
+// ------------------------------------------------------------------------
+// -----------------------------HWCursorLabel------------------------------
+// ------------------------------------------------------------------------
+
+
+@interface HWCursorLabel : UILabel
+
+@property (nonatomic, weak, readonly) UIView *cursorView;
+
+- (void)startAnimating;
+- (void)stopAnimating;
+
+@end
+
+NS_ASSUME_NONNULL_END

CodeTextDemo/CodeTextView/HWTFCursorView.m

@@ -0,0 +1,248 @@
+//
+//  HWTFCursorView.m
+//  CodeTextDemo
+//
+//  Created by 侯万 on 2018/12/13.
+//  Copyright © 2018 小侯爷. All rights reserved.
+//
+
+#import "HWTFCursorView.h"
+
+@interface HWTFCursorView ()
+
+@property (nonatomic, assign) NSInteger itemCount;
+
+@property (nonatomic, assign) CGFloat itemMargin;
+
+@property (nonatomic, weak) UITextField *textField;
+
+@property (nonatomic, weak) UIControl *maskView;
+
+@property (nonatomic, strong) NSMutableArray<HWCursorLabel *> *labels;
+
+@property (nonatomic, strong) NSMutableArray<UIView *> *lines;
+
+@property (nonatomic, weak) HWCursorLabel *currentLabel;
+
+@end
+
+
+
+@implementation HWTFCursorView
+
+#pragma mark - 初始化
+- (instancetype)initWithCount:(NSInteger)count margin:(CGFloat)margin
+{
+    if (self = [super init]) {
+        
+        self.itemCount = count;
+        self.itemMargin = margin;
+        
+        [self configTextField];
+    }
+    return self;
+}
+
+- (void)configTextField
+{
+    self.backgroundColor = [UIColor whiteColor];
+    
+    self.labels = @[].mutableCopy;
+    self.lines = @[].mutableCopy;
+    
+    UITextField *textField = [[UITextField alloc] init];
+    textField.autocapitalizationType = UITextAutocapitalizationTypeNone;
+    textField.keyboardType = UIKeyboardTypeNumberPad;
+    [textField addTarget:self action:@selector(tfEditingChanged:) forControlEvents:(UIControlEventEditingChanged)];
+    
+    // 小技巧：这个属性为YES，可以强制使用系统的数字键盘，缺点是重新输入时，会清空之前的内容
+    // clearsOnBeginEditing 属性并不适用于 secureTextEntry = YES 时
+    // textField.secureTextEntry = YES;
+    
+    [self addSubview:textField];
+    self.textField = textField;
+    
+    // 小技巧：通过textField上层覆盖一个maskView，可以去掉textField的长按事件
+    UIButton *maskView = [UIButton new];
+    maskView.backgroundColor = [UIColor whiteColor];
+    [maskView addTarget:self action:@selector(clickMaskView) forControlEvents:(UIControlEventTouchUpInside)];
+    [self addSubview:maskView];
+    self.maskView = maskView;
+    
+    for (NSInteger i = 0; i < self.itemCount; i++)
+    {
+        HWCursorLabel *label = [HWCursorLabel new];
+        label.textAlignment = NSTextAlignmentCenter;
+        label.textColor = [UIColor darkTextColor];
+        label.font = [UIFont fontWithName:@"PingFangSC-Regular" size:41.5];
+        [self addSubview:label];
+        [self.labels addObject:label];
+    }
+    
+    for (NSInteger i = 0; i < self.itemCount; i++)
+    {
+        UIView *line = [UIView new];
+        line.backgroundColor = [UIColor purpleColor];
+        [self addSubview:line];
+        [self.lines addObject:line];
+    }
+}
+
+
+- (void)layoutSubviews
+{
+    [super layoutSubviews];
+    
+    if (self.labels.count != self.itemCount) return;
+    
+    CGFloat temp = self.bounds.size.width - (self.itemMargin * (self.itemCount - 1));
+    CGFloat w = temp / self.itemCount;
+    CGFloat x = 0;
+    
+    for (NSInteger i = 0; i < self.labels.count; i++)
+    {
+        x = i * (w + self.itemMargin);
+        
+        UILabel *label = self.labels[i];
+        label.frame = CGRectMake(x, 0, w, self.bounds.size.height);
+        
+        UIView *line = self.lines[i];
+        line.frame = CGRectMake(x, self.bounds.size.height - 1, w, 1);
+    }
+    
+    self.textField.frame = self.bounds;
+    self.maskView.frame = self.bounds;
+}
+
+#pragma mark - 编辑改变
+- (void)tfEditingChanged:(UITextField *)textField
+{
+    if (textField.text.length > self.itemCount) {
+        textField.text = [textField.text substringWithRange:NSMakeRange(0, self.itemCount)];
+    }
+    
+    for (int i = 0; i < self.itemCount; i++)
+    {
+        UILabel *label = [self.labels objectAtIndex:i];
+        
+        if (i < textField.text.length) {
+            label.text = [textField.text substringWithRange:NSMakeRange(i, 1)];
+        } else {
+            label.text = nil;
+        }
+    }
+    
+    [self cursor];
+    
+    // 输入完毕后，自动隐藏键盘
+    if (textField.text.length >= self.itemCount) {
+        [self.currentLabel stopAnimating];
+        [textField resignFirstResponder];
+    }
+}
+
+- (void)clickMaskView
+{
+    [self.textField becomeFirstResponder];
+    [self cursor];
+}
+
+- (BOOL)endEditing:(BOOL)force
+{
+    [self.textField endEditing:force];
+    [self.currentLabel stopAnimating];
+    return [super endEditing:force];
+}
+
+#pragma mark - 处理光标
+- (void)cursor
+{
+    [self.currentLabel stopAnimating];
+    
+    NSInteger index = self.code.length;
+    if (index < 0) index = 0;
+    if (index >= self.labels.count) index = self.labels.count - 1;
+    
+    HWCursorLabel *label = [self.labels objectAtIndex:index];
+    
+    [label startAnimating];
+    self.currentLabel = label;
+}
+
+- (NSString *)code
+{
+    return self.textField.text;
+}
+
+@end
+
+
+
+// ------------------------------------------------------------------------
+// -----------------------------HWCursorLabel------------------------------
+// ------------------------------------------------------------------------
+
+
+@implementation HWCursorLabel
+
+- (instancetype)initWithFrame:(CGRect)frame
+{
+    self = [super initWithFrame:frame];
+    if (self) {
+        [self setupView];
+    }
+    return self;
+}
+
+- (instancetype)initWithCoder:(NSCoder *)coder
+{
+    self = [super initWithCoder:coder];
+    if (self) {
+        [self setupView];
+    }
+    return self;
+}
+
+#pragma mark - 初始化View
+- (void)setupView
+{
+    UIView *cursorView = [[UIView alloc] init];
+    cursorView.backgroundColor = [UIColor blueColor];
+    cursorView.alpha = 0;
+    [self addSubview:cursorView];
+    _cursorView = cursorView;
+}
+
+- (void)layoutSubviews
+{
+    [super layoutSubviews];
+    
+    CGFloat h = 30;
+    CGFloat w = 2;
+    CGFloat x = self.bounds.size.width * 0.5;
+    CGFloat y = self.bounds.size.height * 0.5;
+    self.cursorView.frame = CGRectMake(0, 0, w, h);
+    self.cursorView.center = CGPointMake(x, y);
+}
+
+- (void)startAnimating
+{
+    if (self.text.length > 0) return;
+    
+    CABasicAnimation *oa = [CABasicAnimation animationWithKeyPath:@"opacity"];
+    oa.fromValue = [NSNumber numberWithFloat:0];
+    oa.toValue = [NSNumber numberWithFloat:1];
+    oa.duration = 1;
+    oa.repeatCount = MAXFLOAT;
+    oa.removedOnCompletion = NO;
+    oa.fillMode = kCAFillModeForwards;
+    oa.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseIn];
+    [self.cursorView.layer addAnimation:oa forKey:@"opacity"];
+}
+
+- (void)stopAnimating
+{
+    [self.cursorView.layer removeAnimationForKey:@"opacity"];
+}
+
+@end

CodeTextDemo/ViewController.h

@@ -7,6 +7,13 @@
 
 #import <UIKit/UIKit.h>
 
+// 屏幕宽度高度
+#define SW ([UIScreen mainScreen].bounds.size.width)
+#define SH ([UIScreen mainScreen].bounds.size.height)
+
+// 随机色
+#define HWRandomColor [UIColor colorWithRed:arc4random_uniform(256)/255.0 green:arc4random_uniform(256)/255.0 blue:arc4random_uniform(256)/255.0 alpha:1.0]
+
 @interface ViewController : UIViewController
 
 

CodeTextDemo/ViewController.m

@@ -7,18 +7,18 @@
 
 #import "ViewController.h"
 
-#import "HWTFCodeView.h"
-#import "HWTFCodeBView.h"
-#import "HWTextCodeView.h"
-
+// ----------------------------View----------------------------
+#import "HWTFCodeView.h"         // 基础版 - 下划线
+#import "HWTFCodeBView.h"        // 基础版 - 方块
+#import "HWTextCodeView.h"       // 完善版 - 加入动画 - 下划线
+#import "HWTFCursorView.h"       // 基础版 - 下划线 - 有光标
 
 @interface ViewController ()
 
-@property (nonatomic, weak) HWTFCodeView *code1View;
-
-@property (nonatomic, weak) HWTFCodeBView *code2View;
-
+@property (nonatomic, weak) HWTFCodeView   *code1View;
+@property (nonatomic, weak) HWTFCodeBView  *code2View;
 @property (nonatomic, weak) HWTextCodeView *code3View;
+@property (nonatomic, weak) HWTFCursorView *code4View;
 
 @end
 
@@ -28,71 +28,103 @@
 {
     [super viewDidLoad];
     
+    UIScrollView *scrollView = [[UIScrollView alloc] init];
+    scrollView.contentSize = CGSizeMake(SW, SH * 1.5);
+    scrollView.layer.borderColor = [HWRandomColor CGColor];
+    scrollView.layer.borderWidth = 0.5;
+    scrollView.frame = CGRectMake(0, 0, SW, SH);
+    [self.view addSubview:scrollView];
+    
+    UILabel *labx = [UILabel new];
+    labx.textColor = [UIColor grayColor];
+    labx.font = [UIFont systemFontOfSize:16];
+    labx.text = @"😘页面可滑动，防止键盘挡住效果😘";
+    labx.frame = CGRectMake(30, 45, 320, 15);
+    [scrollView addSubview:labx];
+    
+    
+    
     CGFloat x = 30;
-    CGFloat w = self.view.bounds.size.width - x * 2;
+    CGFloat w = SW - x * 2;
     CGFloat h = 50;
     CGFloat y = 100;
     
     // --------------------------------------------------------------------
     
     UILabel *labA = [UILabel new];
-    labA.hidden = YES;
     labA.textColor = [UIColor orangeColor];
     labA.font = [UIFont systemFontOfSize:13];
     labA.text = @"基本实现原理 - 下划线";
     labA.frame = CGRectMake(x, y, 200, 15);
-    [self.view addSubview:labA];
+    [scrollView addSubview:labA];
     
     y = CGRectGetMaxY(labA.frame) + 10;
     
     HWTFCodeView *code1View = [[HWTFCodeView alloc] initWithCount:6 margin:20];
     code1View.frame = CGRectMake(x, y, w, h);
-    [self.view addSubview:code1View];
+    [scrollView addSubview:code1View];
     self.code1View = code1View;
     
     
     // --------------------------------------------------------------------
     
-    y = CGRectGetMaxY(code1View.frame) + 80;
+    y = CGRectGetMaxY(code1View.frame) + 60;
     
     UILabel *labB = [UILabel new];
     labB.textColor = [UIColor orangeColor];
     labB.font = [UIFont systemFontOfSize:13];
     labB.text = @"基本实现原理 - 方块";
     labB.frame = CGRectMake(x, y, 200, 15);
-    [self.view addSubview:labB];
+    [scrollView addSubview:labB];
     
     y = CGRectGetMaxY(labB.frame) + 30;
     
     HWTFCodeBView *code2View = [[HWTFCodeBView alloc] initWithCount:6 margin:20];
     code2View.frame = CGRectMake(x, y, w, h);
-    [self.view addSubview:code2View];
+    [scrollView addSubview:code2View];
     self.code2View = code2View;
     
     
     // --------------------------------------------------------------------
     
-    y = CGRectGetMaxY(code2View.frame) + 80;
+    y = CGRectGetMaxY(code2View.frame) + 60;
     
     UILabel *labC = [UILabel new];
     labC.textColor = [UIColor orangeColor];
     labC.font = [UIFont systemFontOfSize:13];
     labC.text = @"完善版 - 加入动画 - 下划线";
     labC.frame = CGRectMake(x, y, 200, 15);
-    [self.view addSubview:labC];
+    [scrollView addSubview:labC];
     
     y = CGRectGetMaxY(labC.frame) + 30;
     
     HWTextCodeView *code3View = [[HWTextCodeView alloc] initWithCount:6 margin:20];
     code3View.frame = CGRectMake(x, y, w, h);
-    [self.view addSubview:code3View];
+    [scrollView addSubview:code3View];
     self.code3View = code3View;
     
+    // --------------------------------------------------------------------
+    
+    y = CGRectGetMaxY(code3View.frame) + 60;
+    
+    UILabel *labD = [UILabel new];
+    labD.textColor = [UIColor blueColor];
+    labD.font = [UIFont systemFontOfSize:13];
+    labD.text = @"基础版 - 下划线 - 有光标";
+    labD.frame = CGRectMake(x, y, 200, 15);
+    [scrollView addSubview:labD];
+    
+    y = CGRectGetMaxY(labD.frame) + 30;
+    
+    HWTFCursorView *code4View = [[HWTFCursorView alloc] initWithCount:6 margin:20];
+    code4View.frame = CGRectMake(x, y, w, h);
+    [scrollView addSubview:code4View];
+    self.code4View = code4View;
     
     // --------------------------------------------------------------------
     
     UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tap)];
-    [self.view addGestureRecognizer:tap];
+    [scrollView addGestureRecognizer:tap];
 }
 
 
@@ -101,6 +133,7 @@
     [self.code1View endEditing:YES];
     [self.code2View endEditing:YES];
     [self.code3View endEditing:YES];
+    [self.code4View endEditing:YES];
 }
 
 

README.md

@@ -3,11 +3,134 @@
 ## iOS验证码输入
 
 > * Xcode 10.0 (10A255) 新建项目并编辑
-> * 代码日期：2018年09月26日12:30
+> * 代码日期：2018年12月14日15:00
 > * 代码语言：Objective-C
+> * 加入光标小Demo(2018年12月14日)
 
-![效果图](https://github.com/HouWan/CodeTextDemo/blob/master/wx20180926_130752_2x-qibot.cn.png)
+![效果图](https://github.com/HouWan/CodeTextDemo/blob/master/Screen.png)
 
-简书地址：[点我](https://www.jianshu.com/)
+简书地址：[点我](https://www.jianshu.com/p/23f7be3677be)
+简书地址：[点我](https://www.jianshu.com/p/23f7be3677be)
 
 
+----
+
+## 博客内容
+
+![img_2299-qibot.cn.png](https://upload-images.jianshu.io/upload_images/855108-f5c9f906ea6467dd.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
+
+如图所示，现在很多App采用了类似下划线、方块等方式的验证码输入，直观美观！对于这种效果的实现方式，大概有以下几种方式：
+##### 1.多个`UITextField`组成
+这种方式好处是有光标闪烁、但是在处理删除和动画效果时，就会显得有点笨拙，OFO应该是这样实现的，要严格处理好每个`UITextField`的`FirstResponder`。
+##### 2.一个`UITextField`组成，使用富文本
+这个方式是可行的， 使用富文本设置每个字符的间距，允许编辑富文本，有光标闪烁，缺点应该也是不好处理动画效果。
+##### 3.使用`UIView`绘制
+这个是我在`GitHub`上看到的一个半成品Demo，利用一个`UIView`，使用`Quartz 2D`和`UIBezierPath`进行绘制文本和下划线，并处理输入事件和键盘事件，其实整体下来代码也不多，300行以内，但是需要较好的iOS绘制功底。
+##### 4.一个`UITextField`和多个`UILabel`
+这个是我接下来介绍的思路，这个思路的缺点应该是没有光标闪烁，其实也能伪实现，看是否必须要有这个需要了。这个思路比较简单，方便加入动画，纯粹下来就100多行，接下来看结构和代码：
+![wx20180926_114423_2x-qibot.cn.png](https://upload-images.jianshu.io/upload_images/855108-1a2a12e3e3c0df88.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
+
+新建一个`UIView`，初始化方法
+```
+- (instancetype)initWithCount:(NSInteger)count margin:(CGFloat)margin
+{
+    if (self = [super init]) {
+        self.itemCount = count; // itemCount是验证码的个数，比如6个
+        self.itemMargin = margin; // itemMargin是每个Label之间的间距
+        [self configTextField];
+    }
+    return self;
+}
+```
+添加内部子控件（演示）
+```
+- (void)configTextField
+{
+    UITextField *textField = [[UITextField alloc] init];
+    textField.autocapitalizationType = UITextAutocapitalizationTypeNone;
+    textField.keyboardType = UIKeyboardTypeNumberPad;
+    [textField addTarget:self action:@selector(tfEditingChanged:) forControlEvents:(UIControlEventEditingChanged)];
+    
+    // 小技巧：这个属性为YES，可以强制使用系统的数字键盘，缺点是重新输入时，会清空之前的内容
+    // clearsOnBeginEditing 属性并不适用于 secureTextEntry = YES 时
+    // textField.secureTextEntry = YES;
+    
+    [self addSubview:textField];
+    self.textField = textField;
+    
+    // 小技巧：通过textField上层覆盖一个maskView，可以去掉textField的长按事件
+    UIButton *maskView = [UIButton new];
+    maskView.backgroundColor = [UIColor whiteColor];
+    [maskView addTarget:self action:@selector(clickMaskView) forControlEvents:(UIControlEventTouchUpInside)];
+    [self addSubview:maskView];
+    self.maskView = maskView;
+    
+    for (NSInteger i = 0; i < self.itemCount; i++)
+    {
+        UILabel *label = [UILabel new];
+        [self addSubview:label];
+        [self.labels addObject:label];
+    }
+    
+    for (NSInteger i = 0; i < self.itemCount; i++)
+    {
+        UIView *line = [UIView new];
+        [self.lines addObject:line];
+    }
+}
+```
+这里可能对`maskView `有点费解，`maskView`主要是为了挡住下面的`UITextField `，使用类`UIButton `是为了挡住事件，因为如果使用类`UIView `，会将事件传递到`self`，进而影响到外面隐藏键盘的代码，你可以试试就知道了。
+
+##### 主要处理业务逻辑的代码
+
+```
+#pragma mark - 编辑改变
+- (void)tfEditingChanged:(UITextField *)textField
+{
+    if (textField.text.length > self.itemCount) {
+        textField.text = [textField.text substringWithRange:NSMakeRange(0, self.itemCount)];
+    }
+    
+    for (int i = 0; i < self.itemCount; i++)
+    {
+        UILabel *label = [self.labels objectAtIndex:i];
+        
+        if (i < textField.text.length) {
+            label.text = [textField.text substringWithRange:NSMakeRange(i, 1)];
+        } else {
+            label.text = nil;
+        }
+    }
+    
+    // 输入完毕后，自动隐藏键盘
+    if (textField.text.length >= self.itemCount) {
+        [textField resignFirstResponder];
+    }
+}
+```
+这里没有使用`UITextField `的`delegate`，使用`UIControlEventEditingChanged`足以，但是如果你的需求能输入英文等其他字符，就需要实现`delegate`去限制。
+
+至此，验证码输入的核心代码就***没有了***，是不是感觉这么少！！在此基础上，我用Demo实现了3个基本效果，如图所示：
+
+![Screen.png](https://upload-images.jianshu.io/upload_images/855108-da661909e6280eb2.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
+
+#### Github代码地址：[点我](https://github.com/HouWan/CodeTextDemo)
+
+#####小技巧Tip
+当你不想让别人使用某个方法时，除了私有方法办法之外，还可以这么做：
+```
+- (instancetype)init UNAVAILABLE_ATTRIBUTE;
++ (instancetype)new UNAVAILABLE_ATTRIBUTE;
+```
+
+
+## 有问题反馈
+如果大家在使用过程中遇到其他问题，可以留言，我们共同解决。
+
+**PS**:最近我有跳槽的想法，有工作机会的老板，欢迎骚扰哦！北京呦！
+
+**END。**
+*我是小侯爷。*
+*在魔都艰苦奋斗，白天是上班族，晚上是知识服务工作者。*
+*如果读完觉得有收获的话，记得关注和点赞哦。*
+*非要打赏的话，我也是不会拒绝的。*