YYXC_Student/jiaPei/QGPassWordTextField.m

//
//  PassWord.m
//  PayPassWord
//
//  Created by mac on 16/1/14.
//  Copyright © 2016年 mac. All rights reserved.
//

#import "QGPassWordTextField.h"

@implementation QGPassWordTextField

static NSString * tempStr;

- (void)drawRect:(CGRect)rect {

    /** 计算坐标 */
    CGFloat y = 0;
    CGFloat width = rect.size.width / self.passWordCount;
    CGFloat height = rect.size.height;
    CGFloat margin = rect.size.height / 3.0 * 2;
    
    /** 创建存储坐标的数组 */
    NSMutableArray <NSValue *>*frameArr = [NSMutableArray array];
    
    /** 开启位图上下文 循环并绘制竖线*/
    CGContextRef context = UIGraphicsGetCurrentContext();
    for (int i = 0; i < self.passWordCount; i++) {
        [[UIColor grayColor]set];
        CGContextAddRect(context, CGRectMake(i * (width), y, width, height));
        [frameArr addObject:[NSValue valueWithCGRect:CGRectMake(i * (width) + margin, y + margin, width - 2 * margin, height - 2 * margin)]];
        
        if (_showNumber || _showHorizontal) {
            UILabel *label = labelArray[i];
            label.frame = CGRectMake(i * (width) + margin, y + margin, width - 2 * margin, height - 2 * margin);
            if (_showHorizontal) {
                label.text = @"-";
            }else {
                label.text = @"";
            }
        }
    }
    CGContextStrokePath(context);
    
     /** 监听文字变化 */
    [self addTarget:self action:@selector(passWordDidChange:) forControlEvents:UIControlEventEditingChanged];
    
    /** 监听文字个数变化,并且循环并绘制实心圆 */
    if (self.text.length) {
        for (int i = 0; i < self.text.length; i++) {
            if (self.showNumber) {
                UILabel *label = labelArray[i];
                label.text = [self.text substringWithRange:NSMakeRange(i, 1)];
            }else {
                [[UIColor blackColor]set];
                CGContextFillEllipseInRect(context, [frameArr[i] CGRectValue]);
            }
            

            //如果输入够了
            if (_notJudgeComplete) {
                if (FinishInputBlock) {
                    FinishInputBlock(self.text);
                }
            }else {//下边两个后边的条件可以去掉
                if (i == self.passWordCount - 1 && self.text.length == self.passWordCount) {
                    if (FinishInputBlock) {
                        FinishInputBlock(self.text);
                    }
                }
            }
            
        }
    }else{
        return;
    }
    
}

//如果输入位数够了 回调de一个方法
-(void)finishInput:(MyBlockType)block
{
    FinishInputBlock = block;
}

/** 监听文字的变化 */
- (void)passWordDidChange:(UITextField *)sender{
    if (sender.text.length > self.passWordCount) {
        NSRange range = NSMakeRange(0, self.passWordCount);
        sender.text = [sender.text substringWithRange:range];
    }
    [self setNeedsDisplay];
}
#pragma mark - 重写的方法
 /** 重写 setPlaceholder 方法 防止出现 placeHolder*/
-(void)setPlaceholder:(NSString *)placeholder{
}

 /** 重写 initWithFrame 方法 防止出现光标*/   //牛逼
- (instancetype)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        self.tintColor = [UIColor clearColor];
        self.textColor = [UIColor clearColor];
        self.keyboardType = UIKeyboardTypeNumberPad;
        self.passWordCount = 6;

        labelArray = [NSMutableArray array];
        for (int i = 0; i < 10; i ++) {//创建10个 多出来的备用
            UILabel *label = [[UILabel alloc] init];
            [label setText:@"" Font:FontLarger TextColor:[UIColor blackColor] Alignment:NSTextAlignmentCenter];
            [self addSubview:label];
            [labelArray addObject:label];
        }
    }
    return self;
}
/** 重写文字颜色方法 让文字永远是透明色 */
-(void)setTextColor:(UIColor *)textColor{
    textColor = [UIColor clearColor];
    [super setTextColor:textColor];
}

/** 重写光标的颜色方法  让光标永远是透明色 */
-(void)setTintColor:(UIColor *)tintColor{
    tintColor = [UIColor clearColor];
    [super setTintColor:tintColor];
}
/** 禁用复制粘贴的功能 */
- (BOOL)canPerformAction:(SEL)action withSender:(id)sender{
    return NO;
}

/** 重写键盘类型 */
-(void)setKeyboardType:(UIKeyboardType)keyboardType{
    keyboardType = UIKeyboardTypeNumberPad;
    [super setKeyboardType:keyboardType];
}

@end