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城市选择之搜索框

新项目要做城市选择，效果图出来，用系统的搜索框达不到效果图的效果，设置searchBarStyle属性时，UISearchBarStyleDefault时设置barTintColor后边框会有黑线，设置UISearchBarStyleMinimal时无黑线单文本框颜色不符合要求。所以就自定义了下。先看下效果图

城市选择之搜索框

上面两个效果图的区别就是下面的图有个城市和图片。所以就封装到一个类中。只是TextField的LeftView变化。还有个问题就是城市名长短不一，设置城市的时候要进行重绘，所以我在set城市名的时候调用重绘方法。具体代码如下:

 // //  SearchTextField.h //  LocationDemo // //  Created by City--Online on 15/11/30. //  Copyright © 2015年 City--Online. All rights reserved. //  #import <UIKit/UIKit.h>  typedef  void(^LeftBtnClickBlock)();  @interface SearchTextField : UITextField  @property (nonatomic,strong) NSString *leftTitle;  @property (nonatomic,copy)   LeftBtnClickBlock btnClickBlock;  -(instancetype)initNoLeftTitleWithFrame:(CGRect)frame; @end

 // //  SearchTextField.m //  LocationDemo // //  Created by City--Online on 15/11/30. //  Copyright © 2015年 City--Online. All rights reserved. //  #import "SearchTextField.h" #import "Global.h"  @interface SearchTextField ()  @property (nonatomic,strong) UIButton *leftBtn;  @property (nonatomic,strong) UIImageView *leftImgView;  @property (nonatomic,strong) UIImageView *searchImgView;  @property (nonatomic,assign) BOOL isNoLeftTitle; @end  @implementation SearchTextField -(instancetype)initNoLeftTitleWithFrame:(CGRect)frame {     _isNoLeftTitle=YES;     return [self initWithFrame:frame]; } - (instancetype)initWithFrame:(CGRect)frame {     self = [super initWithFrame:frame];     if (self) {                  self.layer.cornerRadius=5;         self.layer.borderWidth=0.5;         self.layer.borderColor=XQBColorLineLight.CGColor;         self.leftViewMode=UITextFieldViewModeAlways;         self.clearButtonMode=UITextFieldViewModeWhileEditing;         self.backgroundColor=[UIColor whiteColor];                  self.leftView=[[UIView alloc]init];                  _leftBtn =[UIButton buttonWithType:UIButtonTypeSystem];         [_leftBtn addTarget:self action:@selector(btnClickHandle:) forControlEvents:UIControlEventTouchUpInside];         [_leftBtn setTitleColor:XQBColorTextMostLight forState:UIControlStateNormal];         [_leftBtn setContentHorizontalAlignment:UIControlContentHorizontalAlignmentLeft];          _leftImgView=[[UIImageView alloc]init];         _leftImgView.image=[UIImage imageNamed:@"login_location_down.png"];         [_leftBtn addSubview:_leftImgView];                  [self.leftView addSubview:_leftBtn];                  _searchImgView=[[UIImageView alloc]init];         _searchImgView.image=[UIImage imageNamed:@"login_location_search.png"];         [self.leftView addSubview:_searchImgView];              }     return self; }  -(void)layoutSubviews {     [super layoutSubviews];          if (_isNoLeftTitle) {         self.leftView.frame=CGRectMake(0, 0, 35, self.frame.size.height);         _leftBtn.frame=CGRectMake(0, 0, 0, 0);                  _leftImgView.frame=CGRectMake(0, 0, 0, 0);         _searchImgView.frame=CGRectMake(10, (self.frame.size.height-15)/2, 15, 15);     }     else{         NSDictionary *attributes=@{NSFontAttributeName: XQBFontMiddle};         CGRect titleFrame=[_leftTitle boundingRectWithSize:CGSizeMake(MAXFLOAT, MAXFLOAT) options:NSStringDrawingUsesLineFragmentOrigin attributes:attributes context:nil];                           self.leftView.frame=CGRectMake(0, 0, 62+titleFrame.size.width, self.frame.size.height);                  _leftBtn.frame=CGRectMake(10, 0, titleFrame.size.width+22, self.frame.size.height);                  [_leftBtn setTitle:_leftTitle forState:UIControlStateNormal];                  _leftImgView.frame=CGRectMake(titleFrame.size.width+10, (self.frame.size.height-5)/2, 10, 5);                  _searchImgView.frame=CGRectMake(titleFrame.size.width+37, (self.frame.size.height-15)/2, 15, 15);     }      }  -(void)btnClickHandle:(id)sender {     _btnClickBlock(); }  -(void)setLeftTitle:(NSString *)leftTitle {     _leftTitle=leftTitle;     _isNoLeftTitle=NO;     [self setNeedsLayout]; } @end

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