duoshoubang/FirstLink/Compoments/详情模块/商品详情/View/SpecSelectView/FKSelectSpec...

//
//  FKProductSingleSpecView.m
//  FirstLink
//
//  Created by jack on 16/1/15.
//  Copyright © 2016年 FirstLink. All rights reserved.
//

#import "FKSelectSpecUnitView.h"
//#import "PindanSpecItem.h"
#import "FKBasicSpecItem.h"

#define kProductSpecBtnTag 300
#define kProductSpecBtnFont 13
#define KProductSpecBtnTitleMargin 8
#define kProductSpecBtnHight 27.0f

@interface FKSelectSpecUnitView ()

@property (nonatomic, strong) UILabel   *titleLabel;
@property (nonatomic, strong) UIButton  *sizeBtn;
@property (nonatomic, strong) UIView    *sizeBottonLine;

@property (nonatomic, strong) UIButton *sizeLinkButton;

@end

@implementation FKSelectSpecUnitView

- (instancetype)initWithFrame:(CGRect)frame{
    if (self = [super initWithFrame:frame]) {
        [self addAllSubviews];
    }
    return self;
}

- (void)addAllSubviews{
    
    [self addSubview:self.titleLabel];
    [self addSubview:self.sizeBtn];
    [self addSubview:self.sizeBottonLine];
    
    [self.titleLabel mas_makeConstraints:^(MASConstraintMaker *make) {
        make.top.equalTo(self).offset(15);
        make.left.equalTo(self).offset(15);
    }];
    
    [self.sizeBtn mas_makeConstraints:^(MASConstraintMaker *make) {
        make.right.equalTo(self).offset(-60);
        make.centerY.equalTo(self.titleLabel);
        make.height.mas_equalTo(25);
    }];
    
    [self.sizeBottonLine mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.right.equalTo(self.sizeBtn);
        make.centerY.equalTo(self.sizeBtn).offset(10);
        make.centerX.equalTo(self.sizeBtn);
        make.height.mas_equalTo(0.5);
    }];
    
    [self addSubview:self.sizeLinkButton];
    [self.sizeLinkButton mas_makeConstraints:^(MASConstraintMaker *make) {
        make.left.equalTo(self.sizeBtn.mas_right).offset(6);
        make.right.equalTo(self);
        make.centerY.equalTo(self.sizeBtn);
        make.height.mas_equalTo(40);
    }];
    
    self.sizeBtn.hidden = YES;
    self.sizeBottonLine.hidden = YES;
    self.sizeBtn.userInteractionEnabled = NO;
    self.sizeLinkButton.hidden = YES;
}

+ (CGFloat)contentHeightForSpecItem:(FKProductSpecItem *)specItem{
    
    NSUInteger rowCount = 0;
    if (specItem.basicSpecArray.count){
        rowCount = [self rowNumberForSepcsArray:specItem.basicSpecArray index:specItem.basicSpecArray.count - 1] + 1;
    }
    
    return 15 + 15 + 20 + rowCount * (kProductSpecBtnHight + 10);
}

- (void)setContentForSpecItem:(FKProductSpecItem *)specItem{
    
    self.specItem = specItem;
    self.titleLabel.text = specItem.specName;
    
    UIButton *preBtn = nil;
    CGFloat rowNum = 0; // 第几行
    
    for (int i = 0; i < specItem.basicSpecArray.count; i++) {
        
        FKBasicSpecItem *basicItem = specItem.basicSpecArray[i];
        
        BOOL selected = basicItem.selected;
        UIButton *button = [self createSpecBtnWithTitle:basicItem.name
                                                    tag:i + kProductSpecBtnTag
                                               selected:selected
                                                 canUse:basicItem.canUse];
        [self addSubview:button];
        
        CGFloat btnWidth = [self sizeForText:basicItem.name withFontSize:kProductSpecBtnFont].width + 2 * KProductSpecBtnTitleMargin;
        
        BOOL rowChange = NO;   // 判断当前button是否另起一行
        NSUInteger  curentRowNum = [FKSelectSpecUnitView rowNumberForSepcsArray:specItem.basicSpecArray index:i];
        
        if (curentRowNum > rowNum && i > 0) {
            rowChange = YES;
            rowNum = curentRowNum;
        }
        
        [button mas_makeConstraints:^(MASConstraintMaker *make) {
            
            if (i == 0){
                make.left.equalTo(self.titleLabel);
                make.top.equalTo(self.titleLabel.mas_bottom).offset(15);
            }else if (rowChange && preBtn){
                make.left.equalTo(self.titleLabel);
                make.top.equalTo(preBtn.mas_bottom).offset(10);
            }else if (preBtn){
                make.left.equalTo(preBtn.mas_right).offset(10);
                make.top.equalTo(preBtn);
            }
            
            make.height.mas_equalTo(kProductSpecBtnHight);
            make.width.mas_equalTo(btnWidth);
        }];
        
        preBtn = button;
    }
    
}

- (void)reloadContent{
    
    for (int i = 0; i < self.specItem.basicSpecArray.count; i++) {
        FKBasicSpecItem *basicItem = [self.specItem basicSpecItemAtIndex:i];
        UIButton *button = [self viewWithTag:kProductSpecBtnTag + i];
        
        if ([button isKindOfClass:[UIButton class]]) {
            [self refresButton:button selected:basicItem.selected canUse:basicItem.canUse];
        }
    }
}

- (void)clearAllBtnState{
    for (UIButton *button in self.subviews) {
        if ([button isKindOfClass:[UIButton class]]) button.selected = NO;
    }
}

- (UIButton *)createSpecBtnWithTitle:(NSString *)title
                                 tag:(int)tag
                            selected:(BOOL)selected
                              canUse:(BOOL)canUse
{
    UIColor *titleColor = selected ? UIColorFromRGB(0xf85a5a) : UIColorFromRGB(0x666666);
    
    UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
    button.tag = tag;
    //    button.userInteractionEnabled = canUse;
    button.titleLabel.font = [UIFont systemFontOfSize:kProductSpecBtnFont];
    button.layer.borderWidth = 0.5f;
    button.layer.borderColor = selected ? [UIColorFromRGB(0xff6362) CGColor] : [UIColorFromRGB(0xcccccc) CGColor];
    
    [button addTarget:self action:@selector(specsBtnClick:) forControlEvents:UIControlEventTouchUpInside];
    [button setTitle:title forState:UIControlStateNormal];
    [button setTitleColor:titleColor forState:UIControlStateNormal];
    
    [self refresButton:button selected:selected canUse:canUse];

    return button;
}

- (void)refresButton:(UIButton *)button
            selected:(BOOL)selected
              canUse:(BOOL)canUse{

    button.userInteractionEnabled = canUse;
    
    if (!canUse){
        [button setBackgroundColor:UIColorFromRGB(0xeeeeee)];
        [button setTitleColor:UIColorFromRGB(0xcccccc) forState:UIControlStateNormal];
        button.layer.borderColor = [UIColor clearColor].CGColor;
    }else{
        [button setBackgroundColor:[UIColor whiteColor]];
        UIColor *titleColor = selected ? UIColorFromRGB(0xf85a5a) : UIColorFromRGB(0x666666);
        button.layer.borderColor = selected ? [UIColorFromRGB(0xff6362) CGColor] : [UIColorFromRGB(0xcccccc) CGColor];
        [button setTitleColor:titleColor forState:UIControlStateNormal];
    }
    
    button.selected = selected;
}

- (CGSize)sizeForText:(NSString *)text withFontSize:(CGFloat)fontSize
{
    if (text.length == 0 || fontSize <= 0) {
        return CGSizeZero;
    }
    NSDictionary *dict = @{NSFontAttributeName : [UIFont systemFontOfSize:fontSize]};
    return [text sizeWithAttributes:dict];
}

// 根据规格按钮算出所在行数
+ (NSUInteger)rowNumberForSepcsArray:(NSArray *)specArray index:(NSUInteger)index
{
    if (specArray.count == 0 || index >= specArray.count) {
        return 0;
    }
    
    CGFloat screenMargin = 15;              // 规格按钮距离屏幕边距
    CGFloat betMargin = 10;                 // 规格按钮之间边距
    CGFloat rowLength = 2 * screenMargin;   // 累计行长度
    CGFloat rowCount = 0;                   // 共几行
    
    for (int i = 0; i < index + 1; i++) {
        
        FKBasicSpecItem *basicItem = specArray[i];
        
        if (basicItem.name.length == 0) continue;
        
        CGFloat titleWidth = [FLStringHelper rectOfString:basicItem.name
                                                     font:[UIFont systemFontOfSize:kProductSpecBtnFont]
                                                   height:CGFLOAT_MAX].size.width;
        
        CGFloat buttonWidth = titleWidth + 2 * KProductSpecBtnTitleMargin;
        
        rowLength += (buttonWidth + (i ? betMargin : 0));
        
        if (rowLength >= UISCREENWIDTH) {
            rowCount++;
            rowLength = buttonWidth + 2 * screenMargin;
        }
    }
    return rowCount;
}

- (void)specsBtnClick:(UIButton *)sender{
    
    BOOL selected = !sender.selected;
    [self clearAllBtnState];
    sender.selected = selected;
    
    NSUInteger index = sender.tag - kProductSpecBtnTag;
    [self.specItem clearAllSelectState];
    
    FKBasicSpecItem *basicItem = [self basicSpecItemAtIndex:index];
    basicItem.selected = sender.selected;
    
    self.specItem.selectedPicUrl = nil;
    if (sender.selected && [basicItem.picUrl isKindOfClass:[NSString class]]) self.specItem.selectedPicUrl = basicItem.picUrl;
    
    if ([self.delegate respondsToSelector:@selector(unitView:basicSpecIndex:selected:)]) {
        [self.delegate unitView:self basicSpecIndex:index selected:sender.selected];
    }
}

- (void)clickSizeBtn:(UIButton *)sender{
    if ([self.delegate respondsToSelector:@selector(showSizePic)]){
        [self.delegate showSizePic];
    }
}

- (void)clickSizeLinkBtn:(UIButton *)sender {
    if ([self.delegate respondsToSelector:@selector(showSizeLink)]){
        [self.delegate showSizeLink];
    }
}

- (FKBasicSpecItem *)basicSpecItemAtIndex:(NSUInteger)index{
    if (index < self.specItem.basicSpecArray.count) {
        return self.specItem.basicSpecArray[index];
    }
    return nil;
}

- (void)setShowSizeIcon:(BOOL)showSizeIcon{
    
    self.sizeBtn.hidden = showSizeIcon ? NO : YES;
    self.sizeBottonLine.hidden = showSizeIcon ? NO : YES;
    self.sizeBtn.userInteractionEnabled = showSizeIcon ? YES : NO;
    
    self.sizeLinkButton.hidden = showSizeIcon ? NO : YES;
}


#pragma mark - property

- (UILabel *)titleLabel{
    if (_titleLabel == nil) {
        _titleLabel = [[UILabel alloc]init];
        _titleLabel.textColor = UIColorFromRGB(0x666666);
        _titleLabel.font = [UIFont systemFontOfSize:kProductSpecBtnFont + 1];
        [_titleLabel setContentHuggingPriority:UILayoutPriorityRequired forAxis:UILayoutConstraintAxisVertical];
    }
    return _titleLabel;
}

- (UIButton *)sizeBtn{
    if (_sizeBtn == nil) {
        _sizeBtn = [UIButton buttonWithType:UIButtonTypeCustom];
        _sizeBtn.titleLabel.font = [UIFont systemFontOfSize:13];
        [_sizeBtn setTitle:@"尺码对照表>" forState:UIControlStateNormal];
        [_sizeBtn setTitleColor:UIColorFromRGB(0x999999) forState:UIControlStateNormal];
        
        [_sizeBtn addTarget:self action:@selector(clickSizeBtn:) forControlEvents:UIControlEventTouchUpInside];
    }
    return _sizeBtn;
}

- (UIButton *)sizeLinkButton {
    if (!_sizeLinkButton) {
        _sizeLinkButton = [UIButton buttonWithType:UIButtonTypeCustom];
        [_sizeLinkButton setImage:[UIImage imageNamed:@"sizeChoiceLinkIcon"] forState:UIControlStateNormal];
        
        [_sizeLinkButton addTarget:self action:@selector(clickSizeLinkBtn:) forControlEvents:UIControlEventTouchUpInside];
    }
    return _sizeLinkButton;
}

- (UIView *)sizeBottonLine{
    if (_sizeBottonLine == nil) {
        _sizeBottonLine = [[UIView alloc]init];
        _sizeBottonLine.backgroundColor = UIColorFromRGB(0xc5c5c5);
    }
    return _sizeBottonLine;
}
@end