First Commit

LFPasswordField/LFPasswordField.h

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+//
+//  LFPasswordField.h
+//  LoanMessage
+//
+//  Created by admin on 2018/1/2.
+//  Copyright © 2018年 admin. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@protocol LFPasswordFieldDelegate;
+
+@interface LFPasswordField : UIView
+
+@property (nullable, nonatomic, weak) id<LFPasswordFieldDelegate> delegate;
+
+/**
+ *  是否密文输入，默认为YES
+ */
+@property (nonatomic, assign) BOOL secureTextEntry;
+/**
+ *  用户输入完成后是否自动取消第一响应，默认为NO
+ */
+@property (nonatomic, assign) BOOL autoResignWhenFinished;
+/**
+ *  边框宽度，默认为1
+ */
+@property (nonatomic, assign) CGFloat borderWidth;
+/**
+ *  边框圆角，默认为5
+ */
+@property (nonatomic, assign) CGFloat borderRaduis;
+/**
+ *  允许输入的数字个数，默认为6，范围在1-8之间，不在范围内的一律忽略
+ */
+@property (nonatomic, assign) NSInteger inputCount;
+/**
+ *  边框颜色，默认灰色
+ */
+@property (nullable, nonatomic, strong) UIColor *  borderColor;
+/**
+ *  文本字体，默认系统17号字
+ */
+@property (nullable, nonatomic, strong) UIFont  *font;
+/**
+ *  文本颜色，默认黑色
+ */
+@property (nullable, nonatomic, strong) UIColor *textColor;
+/**
+ * 用户输入文本
+ */
+@property (nullable, nonatomic, strong, readonly) NSString *text;
+
+@end
+/**
+ * 密码框协议
+ */
+@protocol LFPasswordFieldDelegate <NSObject>
+
+@optional
+
+- (void)passwordFieldDidChange:(LFPasswordField *_Nullable)passwordField;
+
+@end

LFPasswordField/LFPasswordField.m

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+//
+//  LFPasswordField.m
+//  LoanMessage
+//
+//  Created by admin on 2018/1/2.
+//  Copyright © 2018年 admin. All rights reserved.
+//
+
+#import "LFPasswordField.h"
+
+@interface LFPasswordField ()<UIKeyInput>
+
+@property (nonatomic, strong)  NSMutableString *inputText;
+
+@end
+
+@implementation LFPasswordField
+
+- (instancetype)initWithCoder:(NSCoder *)aDecoder {
+    if (self = [super initWithCoder:aDecoder]) {
+        [self initialize];
+    };
+    return self;
+}
+- (instancetype)initWithFrame:(CGRect)frame {
+    if (self = [super initWithFrame:frame]) {
+        [self initialize];
+    }
+    return self;
+}
+- (NSString *)text {
+    if (_inputText.length == 0) {
+        return nil;
+    }
+    return _inputText;
+}
+- (void)setBorderWidth:(CGFloat)borderWidth {
+    _borderWidth = borderWidth;
+    [self setNeedsDisplay];
+}
+- (void)setBorderRaduis:(CGFloat)borderRaduis {
+    _borderRaduis = borderRaduis;
+    [self setNeedsDisplay];
+}
+- (void)setInputCount:(NSInteger)inputCount {
+    if (_inputCount < 1 || _inputCount > 8) {
+        return;
+    }
+    _inputCount = inputCount;
+    [self setNeedsDisplay];
+}
+- (void)setFont:(UIFont *)font {
+    _font = font;
+    [self setNeedsDisplay];
+}
+- (void)setTextColor:(UIColor *)textColor {
+    _textColor = textColor;
+    [self setNeedsDisplay];
+}
+- (void)setSecureTextEntry:(BOOL)secureTextEntry {
+    _secureTextEntry = secureTextEntry;
+    [self setNeedsDisplay];
+}
+- (void)initialize {
+    _borderWidth = 1;
+    _borderRaduis = 5;
+    _inputCount = 6;
+    _borderColor = [UIColor lightGrayColor];
+    _font = [UIFont systemFontOfSize:17];
+    _textColor = [UIColor blackColor];
+    _secureTextEntry = YES;
+    _autoResignWhenFinished = NO;
+    self.inputText = [NSMutableString string];
+    self.backgroundColor = [UIColor clearColor];
+}
+- (UIKeyboardType)keyboardType {
+    return UIKeyboardTypeNumberPad;
+}
+- (BOOL)canBecomeFirstResponder {
+    return YES;
+}
+#pragma mark - UIKeyInput
+- (BOOL)hasText {
+    return self.inputText.length > 0;
+}
+- (void)insertText:(NSString *)text {
+    if (self.inputText.length >= _inputCount) {
+        if (_autoResignWhenFinished) {
+            [self resignFirstResponder];
+        }
+        return;
+    }
+    [self.inputText appendString:text];
+    if (self.inputText.length >= _inputCount) {
+        if (_autoResignWhenFinished) {
+            [self resignFirstResponder];
+        }
+    }
+    if (self.delegate && [self.delegate respondsToSelector:@selector(passwordFieldDidChange:)]) {
+        [self.delegate passwordFieldDidChange:self];
+    }
+    [self setNeedsDisplay];
+}
+- (void)deleteBackward {
+    if (self.inputText.length > 0) {
+        [self.inputText deleteCharactersInRange:NSMakeRange(self.inputText.length - 1, 1)];
+        if (self.delegate && [self.delegate respondsToSelector:@selector(passwordFieldDidChange:)]) {
+            [self.delegate passwordFieldDidChange:self];
+        }
+    }
+    [self setNeedsDisplay];
+}
+- (void)drawRect:(CGRect)rect {
+    [super drawRect:rect];
+    CGFloat height = rect.size.height;
+    CGFloat width = rect.size.width;
+    CGSize  unitSize = CGSizeMake(width/_inputCount, height);
+    CGContextRef context = UIGraphicsGetCurrentContext();
+    [self.borderColor setStroke];
+    CGContextSetLineWidth(context, _borderWidth);
+    CGContextSetLineCap(context, kCGLineCapRound);
+    CGRect bounds = CGRectInset(rect, _borderWidth * 0.5, _borderWidth * 0.5);
+    UIBezierPath *bezierPath = [UIBezierPath bezierPathWithRoundedRect:bounds cornerRadius:_borderRaduis];
+    [[UIColor whiteColor] setFill];
+    CGContextAddPath(context, bezierPath.CGPath);
+    //分割线
+    for (int i = 1; i < _inputCount; ++i) {
+        CGContextMoveToPoint(context, i*width/_inputCount, 0);
+        CGContextAddLineToPoint(context, i*width/_inputCount, height);
+    }
+    CGContextDrawPath(context, kCGPathFillStroke);
+    //当设置密文输入时用小圆点替换数字文本
+    NSDictionary *attrDic = @{NSFontAttributeName:_font,NSForegroundColorAttributeName:_textColor};
+    for (int i = 0; i < self.inputText.length; i++) {
+        CGRect unitRect = CGRectMake(i * unitSize.width,
+                                     0,
+                                     unitSize.width,
+                                     unitSize.height);
+        if (_secureTextEntry) {
+            CGRect drawRect = CGRectInset(unitRect,
+                                          (unitRect.size.width - self.font.pointSize/2) / 2,
+                                          (unitRect.size.height - self.font.pointSize/2) / 2);
+            CGContextAddEllipseInRect(context, drawRect);
+            [[UIColor blackColor] set];
+            CGContextFillPath(context);
+        } else {
+            NSString *subString = [_inputText substringWithRange:NSMakeRange(i, 1)];
+            CGSize textSize = [subString sizeWithAttributes:attrDic];
+            CGRect drawRect = CGRectInset(unitRect, (unitSize.width - textSize.width)/2, (unitSize.height - textSize.height)/2);
+            [subString drawInRect:drawRect withAttributes:attrDic];
+
+        }
+
+    }
+}
+- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
+    [super touchesBegan:touches withEvent:event];
+    if (![self isFirstResponder]) {
+        [self becomeFirstResponder];
+    }
+}
+
+/*
+// Only override drawRect: if you perform custom drawing.
+// An empty implementation adversely affects performance during animation.
+- (void)drawRect:(CGRect)rect {
+    // Drawing code
+}
+*/
+
+@end