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);
// 存
NSMutableArray * searhArray = [[NSUserDefaults standardUserDefaults] objectForKey:@"keywordSearchHistory"];
if(!searhArray) {
searhArray = [NSMutableArrayarray];
}
searhArray = [searhArraymutableCopy];
if([searhArraycontainsObject:_historyArr[i]]) {
[searhArrayremoveObject:_historyArr[i]];
}
[searhArrayaddObject:_historyArr[i]];
[[NSUserDefaults standardUserDefaults] removeObjectForKey:@"keywordSearchHistory"];
[[NSUserDefaults standardUserDefaults] setObject:searhArray forKey:@"keywordSearchHistory"];
PHGoodsListViewController *goodsListVC = [[PHGoodsListViewController alloc] init];
[self.navigationController pushViewController:goodsListVC animated:YES];
}
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