KWMSearchBar.m

//
//  KWMSearchBar.m
//  iCemarose
//
//  Created by HouWeiBin on 16/8/24.
//  Copyright © 2016年 kollway. All rights reserved.
//

#import "KWMSearchBar.h"
#import "KWMShopCartData.h"

@implementation KWMSearchBar

- (id)initWithCoder:(NSCoder *)aDecoder {
    self = [super initWithCoder:aDecoder];
    if (self) {
        [self addView];
    }
    return self;
}

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

-(void) addView{
    [[NSBundle mainBundle] loadNibNamed:NSStringFromClass([self class])
                                  owner:self
                                options:nil];
    
    [self addSubview:self.vView];
    [self.vCount setUserInteractionEnabled:NO];
    [self.lbCount setUserInteractionEnabled:NO];
    _lbCount.text = @"0";
    self.tfSearch.delegate = self;
    self.tfSearch.returnKeyType = UIReturnKeySearch;
    [self initView];
}

- (void)layoutSubviews
{
    [super layoutSubviews];
    self.vView.frame = CGRectMake(0, 0, self.frame.size.width, self.frame.size.height);
}

- (void)setCount:(NSInteger)count{
    _count = count;
    if (count > 0) {
        _lbCount.text = [NSString stringWithFormat:@"%ld",(long)count];
        if (count > 9) {
            _lbCount.font = [UIFont systemFontOfSize:8];
        }
    }else{
        _lbCount.text = @"0";
    }
}

-(void)initView{
    [self resumeView];
}

- (void)resumeView{
    //初始化是不在搜索狀態
    //self.logMarginLeft.constant = 20;
    //本來是20，改成10是因為返回按鈕的位置在那了。。
    self.logMarginLeft.constant = 10;
    //搜索按鈕到logo的距離是 屏幕寬度，減去logo的寬度（135+20left），view本身寬度（22），購物車按鈕的寬度（22+30left+20right）
    self.searchToLog.constant = UI_SCREEN_WIDTH - (135+20) - 22 -(22+30+20);
    //搜索欄的寬度是 屏幕寬度,減去搜索按鈕寬度(22+20left+)，取消按鈕寬度（22+18right）,注意，這個寬度是不會改變的
    self.textFieldWidth.constant = UI_SCREEN_WIDTH - (22+20) - (22+18);
    [self.vView layoutIfNeeded];
    self.vCancel.hidden = YES;
    self.vShopCar.hidden = NO;
    self.tfSearch.hidden = YES;
    self.tfSearch.text = nil;
    self.isSearching= NO;
}

-(void)startAnimation{
    if(self.isSearching){
        //如果正在搜索狀態，該距離為 购物车按钮的宽度(22+30left+20right） ＋ 搜索按钮宽度(22+20left) － 屏幕寬度
        self.logMarginLeft.constant = (22+30+20) + (22 + 20) - UI_SCREEN_WIDTH + 15;
    }else{
        self.logMarginLeft.constant = 10;
    }
    [UIImageView animateWithDuration:0.3 animations:^{
        [self.vView layoutIfNeeded];
        self.vCancel.hidden = !self.isSearching;
        self.tfSearch.hidden = !self.isSearching;
        self.vShopCar.hidden = self.isSearching;
        
        if (self.isSearching) {
            [self.tfSearch becomeFirstResponder];
        }
    }];
};

-(void)onClickStartSearch:(id)sender{
    if(!self.isSearching){
        self.isSearching = YES;
        
        [self startAnimation];
        if([self.delegate respondsToSelector:@selector(kwm_startSearch)]){
            [self.delegate kwm_startSearch];
        }
    }
}

-(void)onClickCancel:(id)sender{
    self.isSearching = NO;
    self.tfSearch.text = nil;
    [self.tfSearch resignFirstResponder];
    [self startAnimation];
    if ([self.delegate respondsToSelector:@selector(kwm_onCancel)]) {
        [self.delegate kwm_onCancel];
    }
}

-(void)onClickShopCar:(id)sender{
    if([self.delegate respondsToSelector:@selector(kwm_onClickShopCar)]){
        [self.delegate kwm_onClickShopCar];
    }
}

//点击背景停止搜索
- (void)stopSearch{
    self.isSearching = NO;
    [self.tfSearch resignFirstResponder];
    [self startAnimation];
}


#pragma mark - UITextFieldDelegate

- (void)textFieldDidBeginEditing:(UITextField *)textField{
    if ([self.delegate respondsToSelector:@selector(kwm_tfSearchBeginEditing)]) {
        [self.delegate kwm_tfSearchBeginEditing];
    }
}

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string{
    if ([textField.text isEqualToString:@""] && [string isEqualToString:@" "]) {
        return NO;
    }
    return YES;
}

- (BOOL)textFieldShouldReturn:(UITextField *)textField{

    if ([self.delegate respondsToSelector:@selector(kwm_tfSearchFinished:)]) {
        [self.delegate kwm_tfSearchFinished:textField.text];
    }
    return YES;
}

@end