iOS仿滚动轮盘键盘

#import <UIKit/UIKit.h>
@class JZNumPickerView;
@protocol JZNumPickerViewDelegate <NSObject>

@optional
/**
 *    按钮点击
 */
-(void)pickerView:(JZNumPickerView *)pickerView selectBtn:(UIButton*)sender;
/**
 *    某位数据发生变化
 */
-(void)pickerViewNumChange:(NSString *)numString;

@end

@interface JZNumPickerView : UIView

@property(nonatomic,strong)UIPickerView* myPickerView;
@property(nonatomic,strong)UIButton* choseKeyboard;

@property(nonatomic,strong)NSString* leftBtnStr;
@property(nonatomic,strong)NSString* rightBtnStr;
@property(nonatomic,assign)NSInteger dataNum; // 数据位数
@property(nonatomic,weak)id<JZNumPickerViewDelegate> delegate;


-(instancetype)initWithFrame:(CGRect)frame DataNum:(NSInteger)dataNum DecimalsNum:(NSInteger)decimalsNum;
/**
 *    改变数据显示
 */
-(void)changePickerViewNum:(NSString *)numString;

/**
 *  获取当前轮盘数据
 *
 *  @return 当前数据
 */
-(NSString *)getCurrentPickerViewNum;

@end

#import "JZNumPickerView.h"
#import <math.h>

#define toolHeight 40
#define buttonWidth 60
#define cusKeyboardHeight 40
#define cusKeyboardWidth 40
#define cusPointWidth 15
#define cusBorderWidth 20
#define maxNum 16380

@interface JZNumPickerView  ()<UIPickerViewDelegate,UIPickerViewDataSource>

@property(nonatomic,strong)UIButton* leftBtn;
@property(nonatomic,strong)UIButton* rightBtn;
//纪录停止时每一位数据，方便计算数据增减总数
@property(nonatomic,strong)NSMutableArray* lastDataArr;
//当前数据
@property(nonatomic,assign)NSInteger numOfNow;
//最大显示数据
@property(nonatomic,assign)NSInteger numOfMax;

//是否显示小数
@property(nonatomic,assign)NSInteger decimalsNum;
@end

@implementation JZNumPickerView

/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect {
    // Drawing code
}
*/

-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{

}

-(void)setLeftBtnStr:(NSString *)leftBtnStr{

    if (self.leftBtn) {
        
        [self.leftBtn setTitle:leftBtnStr forState:UIControlStateNormal];
        [self.leftBtn setTitleColor:[UIColor barItemTintColor] forState:UIControlStateNormal];

    }
}

-(void)setRightBtnStr:(NSString *)rightBtnStr{

    if (self.rightBtn) {
        
        [self.rightBtn setTitle:rightBtnStr forState:UIControlStateNormal];
        [self.rightBtn setTitleColor:[UIColor barItemTintColor] forState:UIControlStateNormal];
    }
}

-(instancetype)initWithFrame:(CGRect)frame DataNum:(NSInteger)dataNum DecimalsNum:(NSInteger)decimalsNum{

    if (self = [super initWithFrame:frame]) {
        
        self.backgroundColor = [UIColor whiteColor];
        self.opaque = NO;
        self.numOfNow = 0;
        self.dataNum = dataNum;
        self.decimalsNum = decimalsNum;
        [self creatView];
        [self loadData];
    }
    return self;
}

-(void)loadData{
    
    self.lastDataArr = [[NSMutableArray alloc] init];
    NSNumber *temp = [NSNumber numberWithInteger:maxNum/2];
    for (NSInteger i = self.dataNum - 1; i >= 0;i--) {
        if (i == self.dataNum - self.decimalsNum-1) {
            continue;
        }
        [self.lastDataArr addObject:temp];
    }
    [self updatePickerData];
    self.numOfMax = [self getMaxNumWithNum:self.dataNum - 1];
}

//-(void)updatePickerData{
//    
//    NSInteger tempNum = self.numOfNow;
//    for (NSInteger i = self.dataNum - 1; i >= 0;i--) {
//        if (i == self.dataNum - 3) {
//            continue;
//        }
//        [self.myPickerView selectRow:maxNum/2 + (tempNum % 10) inComponent:i animated:NO];
//        [self.lastDataArr replaceObjectAtIndex:i > self.dataNum - 3 ? i - 1 : i withObject:[NSNumber numberWithInteger:maxNum/2 + (tempNum % 10)]];
//        tempNum /= 10;
//    }
//}

#warning
-(void)updatePickerData{
    
    NSInteger tempNum = self.numOfNow;
    for (NSInteger i = self.dataNum - 1; i >= 0;i--) {
        if (i == self.dataNum - self.decimalsNum-1) {
            continue;
        }
        [self.myPickerView selectRow:maxNum/2 + (tempNum % 10) inComponent:i animated:NO];
        [self.lastDataArr replaceObjectAtIndex: i > (self.dataNum - self.decimalsNum-1) ? i - 1 : i withObject:[NSNumber numberWithInteger:maxNum/2 + (tempNum % 10)]];
        tempNum /= 10;
    }
}

//#warning test
//-(void)updatePickerData{
//    
//    NSInteger tempNum = self.numOfNow;
//    for (NSInteger i = self.dataNum - 1; i >= 0;i--) {
//        if (i == self.dataNum - 3) {
//            continue;
//        }
//        [self.myPickerView selectRow:(tempNum % 10) inComponent:i animated:NO];
//        [self.lastDataArr replaceObjectAtIndex:i > self.dataNum - 3 ? i - 1 : i withObject:[NSNumber numberWithInteger:(tempNum % 10)]];
//        tempNum /= 10;
//    }
//}

-(NSInteger)getMULWithNum:(NSInteger)num{
    
    NSInteger tempNum = 1;
    for (; num > 0; num--) {
        
        tempNum *= 10;
    }
    return tempNum;
}

-(NSInteger)getMaxNumWithNum:(NSInteger)num{
    
    NSInteger tempNum = 0;
    for (; num > 0; num--) {
        
        tempNum *= 10;
        tempNum += 9;
    }
    return tempNum;
}

-(void)creatView{

    self.myPickerView = [[UIPickerView alloc] initWithFrame:CGRectMake(0, toolHeight, self.frame.size.width, self.frame.size.height - toolHeight - 35)];
    [self addSubview:self.myPickerView];
    self.myPickerView.delegate = self;
    self.myPickerView.dataSource = self;
    
    UIView *btnBackView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.frame.size.width, toolHeight)];
    btnBackView.backgroundColor = [UIColor colorWithRed:245/255.0 green:245/255.0 blue:245/255.0 alpha:1.0];
    [self addSubview:btnBackView];
    
    self.leftBtn = [[UIButton alloc] initWithFrame:CGRectMake(0, 2, buttonWidth, toolHeight - 2*2)];
    [self.leftBtn addTarget:self action:@selector(btnAction:) forControlEvents:UIControlEventTouchUpInside];
    [self addSubview:self.leftBtn];
    
    self.rightBtn = [[UIButton alloc] initWithFrame:CGRectMake(self.frame.size.width - buttonWidth, 2, buttonWidth, toolHeight - 2*2)];
    [self.rightBtn addTarget:self action:@selector(btnAction:) forControlEvents:UIControlEventTouchUpInside];
    [self addSubview:self.rightBtn];
    
    self.choseKeyboard = [UIButton buttonWithType:UIButtonTypeCustom];
    self.choseKeyboard.frame = CGRectMake(self.frame.size.width - cusKeyboardWidth, self.frame.size.height- cusKeyboardHeight, cusKeyboardWidth, cusKeyboardHeight);
    
    [self.choseKeyboard setImage:[UIImage imageNamed:@"ic_keyboard"] forState:UIControlStateNormal];
    [self.choseKeyboard setImage:[UIImage imageNamed:@"ic_keyboard_press"] forState:UIControlStateHighlighted];
    [self.choseKeyboard addTarget:self action:@selector(btnAction:) forControlEvents:UIControlEventTouchUpInside];
    [self addSubview:self.choseKeyboard];

}

-(void)changePickerViewNum:(NSString *)numString{

    if (self.decimalsNum != 0) {
        self.numOfNow = [[NSString stringWithFormat:@"%f",[numString floatValue]*pow(10, self.decimalsNum)] floatValue];
    }else {
        self.numOfNow = [[NSString stringWithFormat:@"%.f",[numString floatValue]] floatValue];
    }
//    NSInteger numOfNowtest = self.numOfNow;
    [self updatePickerData];
}

-(NSString *)getCurrentPickerViewNum{

    if (self.decimalsNum != 0) {
//        CGFloat h = pow(10, -self.decimalsNum);
        return [NSString stringWithFormat:@"%f",(int)self.numOfNow * pow(10, -self.decimalsNum)];
    }else {
        return [NSString stringWithFormat:@"%.f",(self.numOfNow*1.0)];
    }
    //return [NSString stringWithFormat:@"%.2f",((float)self.numOfNow)*0.01];
}

#pragma mark- 事件响应
-(void)btnAction:(UIButton *)sender{

    if ([sender.titleLabel.text isEqualToString:@"取消"]) {
        
        [self dismissPopover];
        [[NSNotificationCenter defaultCenter] postNotificationName:@"JZYBCBScrollviewfamechange" object:nil];

    }
    if ([self.delegate respondsToSelector:@selector(pickerView:selectBtn:)]) {
        
        [self.delegate pickerView:self selectBtn:sender];
    };
}

#pragma mark- UIPickerViewDataSource
-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView{

    return self.dataNum;
}

-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component{

    if (component == self.dataNum - self.decimalsNum-1) {
        return 1;
    }
    return maxNum;
}

#pragma mark- UIPickerViewDelegate
- (CGFloat)pickerView:(UIPickerView *)pickerView rowHeightForComponent:(NSInteger)component
{
    return 28;
}
-(CGFloat)pickerView:(UIPickerView *)pickerView widthForComponent:(NSInteger)component{
    if (self.decimalsNum != 0) {
        if (component == (self.dataNum - (self.decimalsNum+1))) {
            
            return cusPointWidth;
        };
        return (self.frame.size.width-self.decimalsNum*cusPointWidth-cusBorderWidth)/(self.dataNum-1);
    }else {
        return (self.frame.size.width-cusBorderWidth)/(self.dataNum+1);
    }
}

-(NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component{
    
    if (component == (self.dataNum - self.decimalsNum-1)) {
        
        return @".";
    };
    return [NSString stringWithFormat:@"%ld",row % 10];
}

//-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component{
//    
//    //差值
//    NSInteger num = row - [[self.lastDataArr objectAtIndex:component > self.dataNum - 3 ? component - 1 : component] integerValue];
//    if (num <= 0) {
//        NSMutableString *mstr = [[NSMutableString alloc]init];
//        for (int i = 0; i < self.dataNum ; i++) {
//            if (i != self.dataNum - 3) {
//                [mstr appendFormat:@"%ld",[pickerView selectedRowInComponent:i] % 10];
//            }
//        }
//        self.numOfNow = [mstr integerValue];
//    }
//    else
//    {
//        self.numOfNow += num * [self getMULWithNum:component > self.dataNum - 3 ? self.dataNum - component - 1: self.dataNum - component - 2];
//        if (self.numOfNow > self.numOfMax) {
//            self.numOfNow -= self.numOfMax + 1;
//            self.numOfNow = pow(10, self.dataNum) -1;
//        }else if (self.numOfNow < 0){
//            
//            self.numOfNow += self.numOfMax + 1;
//        }
//    }
//    [self updatePickerData];
//    
//    if (self.delegate && [self.delegate respondsToSelector:@selector(pickerViewNumChange:)]) {
//        
//        [self.delegate pickerViewNumChange:[self getCurrentPickerViewNum]];
//    }
//}
//
#warning
-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component{
    
    //差值
    NSInteger num = row - [[self.lastDataArr objectAtIndex:component > (self.dataNum - self.decimalsNum-1) ? component - 1 : component] integerValue];
    if (num <= 0) {
        NSMutableString *mstr = [[NSMutableString alloc]init];
        for (int i = 0; i < self.dataNum ; i++) {
            if (i != self.dataNum - self.decimalsNum-1) {
                [mstr appendFormat:@"%ld",[pickerView selectedRowInComponent:i] % 10];
            }
        }
        self.numOfNow = [mstr integerValue];
    }
    else
    {
        self.numOfNow += num * [self getMULWithNum:component > (self.dataNum - self.decimalsNum-1)? self.dataNum - component - 1: self.dataNum - component - 2];

        if (self.numOfNow > self.numOfMax) {
            self.numOfNow -= self.numOfMax + 1;
            self.numOfNow = pow(10, self.dataNum) -1;
//            NSLog(@"现在的数%ld",self.numOfNow);
        }else if (self.numOfNow < 0){
            
            self.numOfNow += self.numOfMax + 1;
        }
    }
    [self updatePickerData];
    
    if (self.delegate && [self.delegate respondsToSelector:@selector(pickerViewNumChange:)]) {
        
        [self.delegate pickerViewNumChange:[self getCurrentPickerViewNum]];
    }
}
////更改字体大小
//- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view
//{
//    UILabel* pickerLabel = (UILabel*)view;
//    pickerLabel = [[UILabel alloc]initWithFrame:view.bounds];
//    [pickerLabel setFont:[UIFont boldSystemFontOfSize:20]];
//    if (self.decimalsNum != 0) {
//        if (component > self.dataNum -self.decimalsNum-1)
//        {
//            [pickerLabel setFont:[UIFont boldSystemFontOfSize:15]];
//        }
//    }
//    pickerLabel.text=[self pickerView:pickerView titleForRow:row forComponent:component];
//    pickerLabel.textAlignment = NSTextAlignmentCenter;
//    return pickerLabel;
//
//}

@end