设置父控件的alpha，子控件的alpha不会受齐影响
[backView setBackgroundColor:[[UIColor blackColor] colorWithAlphaComponent:0.5f]];

//
//  PayMethod.m
//  YDTX
//
//  Created by 舒通 on 27/02/2017.
//  Copyright © 2017 RookieHua. All rights reserved.
//

#import "PayMethod.h"

#define payMethodHeight 400*HeightScale


@implementation PayMethod
{
    UIView *backView;
    UIView *_backGroundView;
    UIView *titleLabelView;
    UIView *aliPayMethodView;
    UIView *wePayMethodView;
    UIView *payTotalPriceView;
    UIButton *payButton;
    UIButton *aliPayButton;
    UIButton *wePayButton;
    CGFloat _totalPrice;
    NSMutableDictionary *_dic;
}


+ (instancetype)shareInstanceType
{
    
    static PayMethod *payMethod = nil;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        payMethod = [[PayMethod alloc]init];
    });
    return payMethod;
}

#warning 需要传入支付信息模型过来
- (void)payMethodWithTotalPrice:(CGFloat)totalPrice andOrderData:(NSDictionary *)dic
{
    _dic = [NSMutableDictionary dictionaryWithDictionary:dic];
    _totalPrice = totalPrice;
    [self createUI];
    
}

#pragma mark - touch event

- (void)payClick:(UIButton *)sender
{
    if (aliPayButton.selected) {
        [self gotoAliPay];
    }else if (wePayButton.selected) {
        [self gotoWePay];
    } else {
        [SVProgressHUD showErrorWithStatus:@"亲、请选择支付方式~"];
    }
}
/*
 goods_name
 goods_order_num
 Price
 freight
 cou_id
 */
- (void)gotoAliPay
{
    
    //    NSMutableDictionary *param = [[NSMutableDictionary alloc]initWithCapacity:0];
    //
    //    [param setObject:model.goods_order_id forKey:@"order_id"];
    //
    //    //查看优惠券
    //    [[NetWorkService shareInstance] requestForContinuePayMessage:param responseBlock:^(NSNumber *status, NSDictionary *dic) {
    //        NSString *couponPrice = nil;
    //
    //        if (status.integerValue == 201) {
    //
    //            couponPrice = dic[@"data"];
    //        } else {
    //
    //            couponPrice = @"0";
    //        }
    //        if (couponPrice.integerValue > 0) {
    //            [SVProgressHUD showErrorWithStatus:@"您的优惠券已过期"];
    //        }
    //
    //        __weak typeof(self)weakSelf = self;
    //        __strong typeof(weakSelf)strongSelf = weakSelf;
    //        //计算价格 单价*数量 + 运费
    //        __block float totalPrice = 0.0;
    //
    //        int num = model.nums ? model.nums.intValue : 0;
    //        float price = model.price ? model.price.floatValue : 0.0;
    //        if (model.freight.integerValue == 0) {
    //            [[NetWorkService shareInstance]requestForFindFreightMessage:^(NSNumber * _Nonnull status, NSString * _Nonnull freight) {
    //                if (!freight) {
    //                    freight = @"0";
    //                }
    //                totalPrice = num * price + freight.floatValue;
    //                [strongSelf gotoPay:model.goods_name goods_order_num:model.goods_order_num TotalFee:totalPrice couponID:model.cou_id];
    //            }];
    //        } else {
    //            [weakSelf gotoPay:model.goods_name goods_order_num:model.goods_order_num TotalFee:totalPrice couponID:model.cou_id];
    //        }
    //
    //    }];
    //
}
- (void)gotoWePay
{
    [[WeChatDataHandler shareWeChatPayHandler] getBackGroundTransferWithMessage:_dic];
}
- (void)aliPayAction:(UIButton *)sender
{
    sender.selected = !sender.selected;
    wePayButton.selected = NO;
    
}
- (void)wePayAction:(UIButton *)sender
{
    sender.selected = !sender.selected;
    aliPayButton.selected = NO;
}
- (void)shutDownClick:(UIButton *)sender
{
    [backView removeFromSuperview],backView = nil;
    
}
- (void)didClickShutDownButton
{
    [backView removeFromSuperview],backView = nil;
}


#pragma mark - create UI
- (void)createUI
{
    NSArray *_payMethodName = @[@"支付宝支付",@"微信支付"];
    NSArray *_payMethodImage = @[@"AliPay_icon",@"WePay_icon"];
    UIView *view = [UIApplication sharedApplication].keyWindow;
    
    //    底部视图
    if (!backView) {
        
        backView = [[UIView alloc]initWithFrame:[UIScreen mainScreen].bounds];
        
        [backView setBackgroundColor:[[UIColor blackColor] colorWithAlphaComponent:0.5f]];
        [view addSubview:backView];
        
        _backGroundView = [[UIView alloc]init];
        _backGroundView.backgroundColor = [UIColor whiteColor];
        [backView addSubview:_backGroundView];
        [_backGroundView mas_makeConstraints:^(MASConstraintMaker *make) {
            make.top.equalTo(@(ScreenHeight - payMethodHeight));
            make.left.equalTo(backView.mas_left);
            make.size.mas_equalTo(CGSizeMake(ScreenWidth, payMethodHeight));
        }];
        
        titleLabelView = [[UIView alloc]init];
        [_backGroundView addSubview:titleLabelView];
        [titleLabelView mas_makeConstraints:^(MASConstraintMaker *make) {
            make.top.equalTo(_backGroundView.mas_top);
            make.left.equalTo(_backGroundView.mas_left);
            make.size.mas_equalTo(CGSizeMake(ScreenWidth, 45*HeightScale));
        }];
        //
        UIView *lineView1 = [[UIView alloc]init];
        lineView1.backgroundColor = [UIColor colorForHex:@"eeeeee"];
        [_backGroundView addSubview:lineView1];
        [lineView1 mas_makeConstraints:^(MASConstraintMaker *make) {
            make.top.equalTo(titleLabelView.mas_bottom);
            make.left.equalTo(_backGroundView.mas_left).offset(10*WidthScale);
            make.size.mas_equalTo(CGSizeMake(ScreenWidth - 20 *WidthScale, 1));
        }];
        //
        aliPayMethodView = [[UIView alloc]init];
        [_backGroundView addSubview:aliPayMethodView];
        [aliPayMethodView mas_makeConstraints:^(MASConstraintMaker *make) {
            make.top.equalTo(lineView1.mas_bottom);
            make.left.equalTo(_backGroundView.mas_left);
            make.size.mas_equalTo(CGSizeMake(ScreenWidth, 50 *HeightScale));
        }];
        //
        UIView *lineView2 = [[UIView alloc]init];
        lineView2.backgroundColor = [UIColor colorForHex:@"eeeeee"];
        [_backGroundView addSubview:lineView2];
        [lineView2 mas_makeConstraints:^(MASConstraintMaker *make) {
            make.top.equalTo(aliPayMethodView.mas_bottom);
            make.left.equalTo(_backGroundView.mas_left).offset(10*WidthScale);
            make.size.mas_equalTo(CGSizeMake(ScreenWidth - 20 *WidthScale, 1));
        }];
        //
        wePayMethodView = [[UIView alloc]init];
        [_backGroundView addSubview:wePayMethodView];
        [wePayMethodView mas_makeConstraints:^(MASConstraintMaker *make) {
            make.top.equalTo(lineView2.mas_bottom);
            make.left.equalTo(_backGroundView.mas_left);
            make.size.mas_equalTo(CGSizeMake(ScreenWidth, 50*HeightScale));
        }];
        
        UIView *lineView3 = [[UIView alloc]init];
        lineView3.backgroundColor = [UIColor colorForHex:@"eeeeee"];
        [_backGroundView addSubview:lineView3];
        [lineView3 mas_makeConstraints:^(MASConstraintMaker *make) {
            make.top.equalTo(wePayMethodView.mas_bottom);
            make.left.equalTo(_backGroundView.mas_left).offset(10*WidthScale);
            make.size.mas_equalTo(CGSizeMake(ScreenWidth - 20 *WidthScale, 1));
        }];
        
        
        payTotalPriceView = [[UIView alloc]init];
        [_backGroundView addSubview:payTotalPriceView];
        [payTotalPriceView mas_makeConstraints:^(MASConstraintMaker *make) {
            make.top.equalTo(lineView3.mas_bottom).offset(10*HeightScale);
            make.left.equalTo(_backGroundView.mas_left);
            make.size.mas_equalTo(CGSizeMake(ScreenWidth, 50*HeightScale));
        }];
        //
        //
        payButton = [UIButton buttonWithType:UIButtonTypeCustom];
        payButton.frame = CGRectMake(10*WidthScale, (400 - 80)*HeightScale, ScreenWidth-20*WidthScale, 50*HeightScale);
        
        payButton.titleLabel.font = [UIFont systemFontOfSize:18*HeightScale];
        payButton.layer.cornerRadius = 5;
        payButton.layer.masksToBounds = YES;
        payButton.backgroundColor = [UIColor colorForHex:@"168ce3"];
        [payButton setTitle:@"确认支付" forState:UIControlStateNormal];
        [payButton addTarget:self action:@selector(payClick:) forControlEvents:UIControlEventTouchUpInside];
        [_backGroundView addSubview:payButton];
        
        
        //控件
        UILabel *titleLabel = [self creatMethodLabelWithTitle:@"付款方式"];
        titleLabel.textColor = [UIColor colorForHex:@"020202"];
        titleLabel.font = [UIFont systemFontOfSize:18*HeightScale];
        titleLabel.textAlignment = NSTextAlignmentCenter;
        [titleLabelView addSubview:titleLabel];
        [titleLabel mas_makeConstraints:^(MASConstraintMaker *make) {
            make.centerX.equalTo(titleLabelView.mas_centerX);
            make.centerY.equalTo(titleLabelView.mas_centerY);
        }];
        UIButton *shutDownbutton = [self createMethodButtonWithImageName:@"payMetodShutDown" andSelector:@selector(shutDownClick:)];
        
        [shutDownbutton setImageEdgeInsets:UIEdgeInsetsMake(0, 25, 0, 0)];
        [titleLabelView addSubview:shutDownbutton];
        [shutDownbutton mas_makeConstraints:^(MASConstraintMaker *make) {
            make.centerY.equalTo(titleLabel.mas_centerY);
            make.right.equalTo(titleLabelView.mas_right);
            make.height.equalTo(@(45*HeightScale));
            make.width.equalTo(@(70 * WidthScale));
        }];
        //
        ////        阿里支付
        UIImageView *aliPayImageView = [self createMethodImageViewWithImageName:_payMethodImage[0]];
        [aliPayMethodView addSubview:aliPayImageView];
        [aliPayImageView mas_makeConstraints:^(MASConstraintMaker *make) {
            make.left.equalTo(aliPayMethodView.mas_left).offset(20*WidthScale);
            make.top.equalTo(aliPayMethodView.mas_top).offset(10*HeightScale);
            make.size.mas_equalTo(CGSizeMake(30*HeightScale, 30*HeightScale));
        }];
        UILabel *aliPayTitleLabel = [self creatMethodLabelWithTitle:_payMethodName[0]];
        aliPayTitleLabel.textColor = [UIColor colorForHex:@"2e2e2e"];
        aliPayTitleLabel.font = [UIFont systemFontOfSize:15*HeightScale];
        [aliPayMethodView addSubview:aliPayTitleLabel];
        [aliPayTitleLabel mas_makeConstraints:^(MASConstraintMaker *make) {
            make.left.equalTo(aliPayImageView.mas_right).offset(15*WidthScale);
            make.centerY.equalTo(aliPayImageView.mas_centerY);
        }];
        aliPayButton = [self createMethodButtonWithImageName:nil andSelector:@selector(aliPayAction:)];
        [aliPayMethodView addSubview:aliPayButton];
        [aliPayButton mas_makeConstraints:^(MASConstraintMaker *make) {
            make.centerY.equalTo(aliPayTitleLabel.mas_centerY);
            make.right.equalTo(aliPayMethodView.mas_right).offset(-10*WidthScale);
            make.size.mas_equalTo(CGSizeMake(30*WidthScale, 40*HeightScale));
        }];
        
        //        微信支付
        UIImageView *wePayImageView = [self createMethodImageViewWithImageName:_payMethodImage[1]];//
        [wePayMethodView addSubview:wePayImageView];
        [wePayImageView mas_makeConstraints:^(MASConstraintMaker *make) {
            make.left.equalTo(wePayMethodView.mas_left).offset(20*WidthScale);
            make.top.equalTo(wePayMethodView.mas_top).offset(10*HeightScale);
            make.size.mas_equalTo(CGSizeMake(30*HeightScale, 30*HeightScale));
        }];
        UILabel *wePayTitleLabel = [self creatMethodLabelWithTitle:_payMethodName[1]];
        wePayTitleLabel.textColor = [UIColor colorForHex:@"2e2e2e"];
        wePayTitleLabel.font = [UIFont systemFontOfSize:15*HeightScale];
        [wePayMethodView addSubview:wePayTitleLabel];
        [wePayTitleLabel mas_makeConstraints:^(MASConstraintMaker *make) {
            make.left.equalTo(wePayImageView.mas_right).offset(15*WidthScale);
            make.centerY.equalTo(wePayImageView.mas_centerY);
        }];
        wePayButton = [self createMethodButtonWithImageName:nil andSelector:@selector(wePayAction:)];
        [wePayMethodView addSubview:wePayButton];
        [wePayButton mas_makeConstraints:^(MASConstraintMaker *make) {
            make.centerY.equalTo(wePayTitleLabel.mas_centerY);
            make.right.equalTo(wePayMethodView.mas_right).offset(-10*WidthScale);
            make.size.mas_equalTo(CGSizeMake(30*WidthScale, 40*HeightScale));
        }];
        
        //支付价格
        UILabel *payTotalPriceTitleLabel = [self creatMethodLabelWithTitle:@"需付款"];
        payTotalPriceTitleLabel.font = [UIFont systemFontOfSize:15*HeightScale];
        payTotalPriceTitleLabel.textColor = [UIColor colorForHex:@"2e2e2e"];
        [payTotalPriceView addSubview: payTotalPriceTitleLabel];
        [payTotalPriceTitleLabel mas_makeConstraints:^(MASConstraintMaker *make) {
            make.top.equalTo(payTotalPriceView.mas_top).offset(10*HeightScale);
            make.left.equalTo(payTotalPriceView.mas_left).offset(20*WidthScale);
        }];
        UILabel *parTotalPriceLabel = [self creatMethodLabelWithTitle:[NSString stringWithFormat:@"%0.2f元",_totalPrice]];
        parTotalPriceLabel.font = [UIFont systemFontOfSize:18*HeightScale];
        parTotalPriceLabel.textColor = [UIColor colorForHex:@"2e2e2e"];
        [payTotalPriceView addSubview: parTotalPriceLabel];
        [parTotalPriceLabel mas_makeConstraints:^(MASConstraintMaker *make) {
            make.centerY.equalTo(payTotalPriceTitleLabel.mas_centerY);
            make.right.equalTo(payTotalPriceView.mas_right).offset(-10*WidthScale);
        }];
    }
}

#pragma mark - create payMethod button and label and imageView
- (UIImageView *)createMethodImageViewWithImageName:(NSString *)name
{
    UIImageView *imageView = [[UIImageView alloc]init];
    imageView.image = [UIImage imageNamed:name];
    imageView.layer.cornerRadius = 5;
    imageView.layer.masksToBounds = YES;
    return imageView;
}
- (UILabel *)creatMethodLabelWithTitle:(NSString *)title
{
    UILabel *label = [[UILabel alloc]init];
    label.text = title;
    [label sizeToFit];
    label.textColor = [UIColor blackColor];
    
    return label;
}
- (UIButton *)createMethodButtonWithImageName:(NSString *)imageName andSelector:(SEL)selector
{
    UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
    [button setImage:[UIImage imageNamed:@"Pay_circle_icon"] forState:UIControlStateNormal];
    [button setImage:[UIImage imageNamed:@"Pay_circle_icon_hl"] forState:UIControlStateSelected];
    if (imageName) {
        [button setImage:[UIImage imageNamed:imageName] forState:UIControlStateNormal];
    }
    [button addTarget:self action:selector forControlEvents:UIControlEventTouchUpInside];
    return button;
}


@end