关于自定义数字键盘

Simulator Screen Shot - iPhone X - 2018-10-22 at 17.04.01.png

主要思路是用递归算法创建按钮结合Block实现该功能
首先定义按钮的View
KeyBordView.h

#import <UIKit/UIKit.h>
#define MAINSCREEN [UIScreen mainScreen].bounds
typedef void(^CountClickBlock)(NSString *num);
typedef void(^DeleteClickBlock)(void);
typedef void(^CodeClickBlock)(void);
typedef void(^ScanClickBlock)(void);
@interface KeyBordView : UIView
@property (nonatomic, strong) CountClickBlock countClick;
@property (nonatomic, strong) DeleteClickBlock deleteClick;
@property (nonatomic, strong) CodeClickBlock codeBlock;
@property (nonatomic, strong) ScanClickBlock scanBlock;
@end

KeyBordView.m

@implementation KeyBordView

/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect {
    // Drawing code
}
*/
- (instancetype)initWithFrame:(CGRect)frame{
    if ([super initWithFrame:frame]) {
        [self initView];
    }
    return self;
}
- (void)initView{
    CGFloat W = MAINSCREEN.size.width/4;
    for (int i=0; i<=10; i++) {
        UIButton *buton = [UIButton buttonWithType:UIButtonTypeCustom];
        [buton setBackgroundColor: [UIColor whiteColor]];
        [buton setTitle:[NSString stringWithFormat:@"%d",10-i] forState:UIControlStateNormal];
        [buton addTarget:self action:@selector(countClick:) forControlEvents:UIControlEventTouchUpInside];
        [buton setTitleColor:[UIColor darkGrayColor] forState:0];
        if (i==0) {
            buton.tag = 100;
            buton.frame = CGRectMake(0, 150, W*2, 50);
            [buton setTitle:@"0" forState:UIControlStateNormal];
        }else if(i == 10){
            buton.tag = 110;
            buton.frame = CGRectMake(W*2, 150, W, 50);
            [buton setTitle:@"." forState:UIControlStateNormal];
        }else{
            buton.tag = 10-i+100;
            buton.frame = CGRectMake(((i-1)%3)*W,(i-1)/3*50 , W, 50);
        }
         [self addSubview:buton];
    }
    UIButton *deletBtn = [[UIButton alloc]init];
    [deletBtn setTitle:@"删除" forState:0];
    [deletBtn setTitleColor:[UIColor darkGrayColor] forState:0];
    [deletBtn addTarget:self action:@selector(deleteClick:) forControlEvents:UIControlEventTouchUpInside];
    deletBtn.frame = CGRectMake(W*3, 0, W, 50);
    [self addSubview:deletBtn];
    
    UIButton *codeMoneyBtn = [[UIButton alloc]init];
    [codeMoneyBtn setTitle:@"收款" forState:0];
    [codeMoneyBtn setTitleColor:[UIColor darkGrayColor] forState:0];
    [codeMoneyBtn addTarget:self action:@selector(codeGetMoney:) forControlEvents:UIControlEventTouchUpInside];
    codeMoneyBtn.frame = CGRectMake(W*3, 50, W, 100);
    [self addSubview:codeMoneyBtn];
    
    UIButton *scanBtn = [[UIButton alloc]init];
    [scanBtn setTitle:@"扫描" forState:0];
    [scanBtn setTitleColor:[UIColor darkGrayColor] forState:0];
    [scanBtn addTarget:self action:@selector(codeScanClick:) forControlEvents:UIControlEventTouchUpInside];
    scanBtn.frame = CGRectMake(W*3, 150, W, 50);
    [self addSubview:scanBtn];
}
- (void)countClick:(UIButton *)sender{
    self.countClick(sender.titleLabel.text);
}
- (void)deleteClick:(UIButton *)sender{
    self.deleteClick();
}
- (void)codeGetMoney:(UIButton *)sender{
    NSLog(@"二维码收款");
    self.codeBlock();
}
- (void)codeScanClick:(UIButton *)sender{
    NSLog(@"扫描");
    self.scanBlock();
}
@end
//此处MAINSCREEN是屏幕宽度

最后主控制器调用

#import "KeyBordView.h"

@interface GatheringVC ()
@property (nonatomic, strong) UITextField *tf;
@end

@implementation GatheringVC
- (UITextField *)tf{
    if (!_tf) {
        UITextField *t = [[UITextField alloc]init];
        t.font = [UIFont systemFontOfSize:25];
        _tf = t;
    }
    return _tf;
}
- (void)viewDidLoad {
    [super viewDidLoad];
    self.view.backgroundColor = [UIColor whiteColor];
    // Do any additional setup after loading the view.
    KeyBordView *view = [[KeyBordView alloc]init];
    view.frame = CGRectMake(0, 120, MAINSCREEN.size.width, 200);
    [self.view addSubview:view];
    view.countClick = ^(NSString *num) {
        if ([num isEqualToString:@"."]) {
            if (![_tf.text containsString:@"."]) {
               _tf.text = [NSString stringWithFormat:@"%@%@",_tf.text,num];
            }
        }else{
          _tf.text = [NSString stringWithFormat:@"%@%@",_tf.text,num];
        }
    };
    view.deleteClick = ^{
        NSString * str = _tf.text;
        if (str.length>=1) {
            str = [str substringToIndex:([str length]-1)];
            _tf.text = str;
        }
    };
    view.scanBlock = ^{
        NSLog(@"按钮点击");
    };
    view.codeBlock = ^{
        NSLog(@"按钮点击");
    };
    [self.view addSubview:self.tf];
    _tf.frame = CGRectMake(10, view.center.y+100, MAINSCREEN.size.width-20, 100);
}

真的猛士，敢于直面惨淡的人生，敢于正视淋漓的鲜血。这是怎样的哀痛者和幸福者？然而造化又常常为庸人设计，以时间的流驶，来洗涤旧迹，仅使留下淡红的血色和微漠的悲哀。在这淡红的血色和微漠的悲哀中，又给人暂得偷生，维持着这似人非人的世界。我不知道这样的世界何时是一个尽头！