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
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.//#importtypedef 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