iOS_搜索记录，历史搜索排版、记录

textfiled的创建搜索框，在左侧添加图片

CGFloatviewWith =self.bounds.size.width;

_searchTf= [[UITextFieldalloc]initWithFrame:CGRectMake(20*unitPX,STATUS_BAR_HEIGHT+4, viewWith -80*unitPX,35)];

_searchTf.borderStyle = UITextBorderStyleNone;

_searchTf.backgroundColor=PHDJColor(243,243,243);

_searchTf.layer.masksToBounds = YES;

_searchTf.layer.cornerRadius = 17;

_searchTf.placeholder = @"搜索商品";

[self addSubview:_searchTf];

UIImage*im = [UIImageimageNamed:@"ic_search"];

_searchIconImg = [[UIImageView alloc] initWithFrame:CGRectMake(10*unitPX, 0, 20, 20)];

_searchIconImg.image = im;

UIView*leftView = [[UIViewalloc]initWithFrame:CGRectMake(15*unitPX,0,40*unitPX,20)];

[leftViewaddSubview:_searchIconImg];

_searchTf.leftViewMode = UITextFieldViewModeAlways;

_searchTf.leftView= leftView;

代码：

// 搜索历史，布局

-(void)creatHistoryView

{

CGFloatnavigationHight =STATUS_BAR_HEIGHT+50;

// 显示搜索记录的底部view

_historyView= [[UIViewalloc]init];

_historyView.frame=CGRectMake(0, navigationHight,SCREEN_WIDTH,200*unitPX);

_historyView.backgroundColor = [UIColor whiteColor];

[self.view addSubview:_historyView];

// title

UILabel*historyLabel = [[UILabelalloc]initWithFrame:CGRectMake(20*unitPX,10*unitPX,200,30*unitPX)];

historyLabel.text=@"历史搜索";

historyLabel.font= [UIFontfontWithName:@"Helvetica-Bold"size:15];

[_historyViewaddSubview:historyLabel];

// 清除搜索记录

UIButton *cleanBtn = [UIButton buttonWithType:UIButtonTypeCustom];

cleanBtn.frame = CGRectMake(SCREEN_WIDTH - 45*unitPX, 12*unitPX, 25*unitPX, 25*unitPX);

cleanBtn.backgroundColor = [UIColor cyanColor];

[cleanBtnaddTarget:self action:@selector(cleanHistoryKeyWord) forControlEvents:UIControlEventTouchUpInside];

[_historyViewaddSubview:cleanBtn];

// 取搜索历史记录

_historyArr = [[NSUserDefaults standardUserDefaults] objectForKey:@"keywordSearchHistory"];

_historyArr = [[_historyArr reverseObjectEnumerator] allObjects];

_btnLeftW = 15*unitPX; // 保存前一个button的宽以及前一个button距离屏幕边缘的距离

_btnTopH = 45*unitPX; // 用来控制button距离父视图的高

// 如果没有搜索记录，显示提示label

if(_historyArr.count==0) {

_noHistoryLabel= [[UILabelalloc]initWithFrame:CGRectMake(30*unitPX,_btnTopH,200,30*unitPX)];

_noHistoryLabel.text = @"无搜索记录";

_noHistoryLabel.textColor = [UIColor grayColor];

_noHistoryLabel.font = [UIFont systemFontOfSize:13];

[_historyView addSubview:_noHistoryLabel];

}else{

for(inti =0; i <_historyArr.count; i++) {

_historyBtn = [UIButton buttonWithType:UIButtonTypeCustom];

_historyBtn.backgroundColor=PHDJColor(245,245,245);

[_historyBtnsetTitleColor:PHDJColor(32,32,32)forState:0];

_historyBtn.titleLabel.font = [UIFont systemFontOfSize:13];

_historyBtn.tag=100+i;

_historyBtn.layer.cornerRadius=15*unitPX;

_historyBtn.layer.masksToBounds=YES;

[_historyBtn addTarget:self action:@selector(historyBtnClick:) forControlEvents:UIControlEventTouchUpInside];

//根据计算文字的大小

NSDictionary *attributes = @{NSFontAttributeName:[UIFont systemFontOfSize:13]};

CGFloat length = [_historyArr[i] boundingRectWithSize:CGSizeMake(320, 2000) options:NSStringDrawingUsesLineFragmentOrigin attributes:attributes context:nil].size.width;

[_historyBtnsetTitle:_historyArr[i]forState:0];

_historyBtn.frame=CGRectMake(10*unitPX+_btnLeftW,_btnTopH, length +20*unitPX,30*unitPX);

//当button的位置超出屏幕边缘时换行

if(10*unitPX+_btnLeftW+ length +20*unitPX>SCREEN_WIDTH-30*unitPX){

_btnLeftW=15*unitPX;//换行时将w置为15

_btnTopH=_btnTopH+_historyBtn.frame.size.height+10*unitPX;//距离父视图也变化

_historyBtn.frame=CGRectMake(10*unitPX+_btnLeftW,_btnTopH, length +20*unitPX,30*unitPX);//重设button的frame

}

_btnLeftW = _historyBtn.frame.size.width + _historyBtn.frame.origin.x;

[_historyView addSubview:_historyBtn];

}

// 通过搜索历史记录的行数，最终重新计算搜索历史底部view的高度

_historyView.frame=CGRectMake(0, navigationHight,SCREEN_WIDTH,_btnTopH+45*unitPX);

// [self hotSearchView];

}

数据记录，逻辑处理

// 点击搜索

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

// 空格处理

NSString *textLength = [textField.text stringByReplacingOccurrencesOfString:@" " withString:@""];

if(textLength.length==0) {

returnNO;

}

// 存

NSMutableArray * searhArray = [[NSUserDefaults standardUserDefaults] objectForKey:@"keywordSearchHistory"];

if(!searhArray) {

searhArray = [NSMutableArrayarray];

}

searhArray = [searhArraymutableCopy];

if([searhArraycontainsObject: textLength]) {

[searhArrayremoveObject:textLength];

}

[searhArrayaddObject:textLength];

[[NSUserDefaults standardUserDefaults] removeObjectForKey:@"keywordSearchHistory"];

[[NSUserDefaults standardUserDefaults] setObject:searhArray forKey:@"keywordSearchHistory"];

PHGoodsListViewController *goodsListVC = [[PHGoodsListViewController alloc] init];

[self.navigationController pushViewController:goodsListVC animated:YES];

return YES;

}

// 清空历史记录

-(void)cleanHistoryKeyWord{

// 删除

[[NSUserDefaults standardUserDefaults]removeObjectForKey:@"keywordSearchHistory"];

if(_historyArr.count>0) {

[_historyView removeFromSuperview];

[self creatHistoryView];

}

NSLog(@"clean_cleanHistoryKeyWord");

}

// 搜索历史记录点击

-(void)historyBtnClick:(UIButton*)sender{

NSIntegeri = sender.tag-100;

NSLog(@"%ld",i);