自定义UISearchBar

Demo:http://download.csdn.net/detail/u012881779/8648957

1.更改搜索栏样式：

#import "ViewController.h"
#import "SearchBar.h"
@interface ViewController () <UISearchBarDelegate,UITextFieldDelegate>
@property (weak, nonatomic) IBOutlet UISearchBar *searchView;
@property (strong, nonatomic) UIView             *gInView;  //内边框

@end

@implementation ViewController
@synthesize gInView = _gInView;

- (void)viewDidLoad {
    [super viewDidLoad];
    
    //改变searchBar样式
    [self cSearchBar];
    
    //自定义UISearchBar
    SearchBar *search = [[SearchBar alloc] initWithFrame:CGRectMake(0, 300, self.view.frame.size.width, 44)];
    [self.view addSubview:search];
    
}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
    [self.view endEditing:YES];
}

//搜索栏
-(void)cSearchBar{
    float height = _searchView.frame.size.height;
    float width = _searchView.frame.size.width;
    
    //提示文本颜色
    UITextField *searchField = [_searchView valueForKey:@"_searchField"];
    [searchField setTextColor:[UIColor blackColor]];
    [searchField setValue:[UIColor grayColor] forKeyPath:@"_placeholderLabel.textColor"];
    [searchField setFont:[UIFont systemFontOfSize:14]];
    [searchField setBackgroundColor:[UIColor whiteColor]];
    
    [_searchView setPlaceholder:@"输入关键字搜索"];
    [_searchView setBackgroundColor:[UIColor clearColor]];
    
    //外背景
    UIView *outV = [[UIView alloc] initWithFrame:CGRectMake(0, 0, width, height)];
    [outV setBackgroundColor:[UIColor clearColor]];
    
    //内边框
    if(!_gInView){
        _gInView = [[UIView alloc] init];
    }
    [_gInView setFrame:CGRectMake(7, 6, width-14, height-12)];
    [_gInView setBackgroundColor:[UIColor clearColor]];
    [_gInView.layer setBorderWidth:1];
    [_gInView.layer setCornerRadius:6];
    CGColorRef colorref = [[UIColor colorWithRed:200.0/255 green:200.0/255 blue:200.0/255 alpha:1] CGColor];
    [_gInView.layer setBorderColor:colorref];
    if([[UIDevice currentDevice].systemVersion floatValue] >= 7.0){
        [_gInView setHidden:NO];
    }else{
        [_gInView setHidden:YES];
    }
    [outV addSubview:_gInView];
    [outV setBackgroundColor:[UIColor whiteColor]];
    [_searchView insertSubview:outV atIndex:1];

}

#pragma mark UISearchBarDelegate
- (BOOL)searchBarShouldBeginEditing:(UISearchBar *)searchBar{
    CGColorRef colorref = [[UIColor colorWithRed:34.0/255 green:129.0/255 blue:203.0/255 alpha:1] CGColor];
    [_gInView.layer setBorderColor:colorref];
        
    return  YES;
}

//完成编辑
- (BOOL)searchBarShouldEndEditing:(UISearchBar *)searchBar{
    CGColorRef colorref = [[UIColor colorWithRed:200.0/255 green:200.0/255 blue:200.0/255 alpha:1] CGColor];
    [_gInView.layer setBorderColor:colorref];
    [self.view endEditing:YES];
    return YES;
}

//搜索按键
- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar{
    [self.view endEditing:YES];
}


@end
 

2.重写UISearchBar：

#import <UIKit/UIKit.h>
@interface SearchBar : UISearchBar

@end

#import "SearchBar.h"
@implementation SearchBar
- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        // Initialization code
        self.tintColor = [UIColor whiteColor];
    }
    return self;
}

-(void) layoutSubviews
{
    [super layoutSubviews];
    
    UITextField *searchField;
    NSArray *subviewArr = self.subviews;
    for(int i = 0; i < subviewArr.count ; i++) {
        UIView *viewSub = [subviewArr objectAtIndex:i];
        NSArray *arrSub = viewSub.subviews;
        for (int j = 0; j < arrSub.count ; j ++) {
            id tempId = [arrSub objectAtIndex:j];
            if([tempId isKindOfClass:[UITextField class]]) {
                searchField = (UITextField *)tempId;
            }
        }
    }
    
    //自定义UISearchBar
    if(searchField) {
        searchField.placeholder = @"输入要查找的关键字";
        [searchField setBorderStyle:UITextBorderStyleRoundedRect];
        [searchField setBackgroundColor:[UIColor blueColor]];
        [searchField setValue:[UIColor whiteColor] forKeyPath:@"_placeholderLabel.textColor"];
        [searchField setTextColor:[UIColor orangeColor]];
        
        //自己的搜索图标
        NSString *path = [[NSBundle mainBundle] pathForResource:@"search1" ofType:@"png"];
        UIImage *image = [UIImage imageWithContentsOfFile:path];
        UIImageView *iView = [[UIImageView alloc] initWithImage:image];
        [iView setFrame:CGRectMake(0.0, 0.0, 16.0, 16.0)];
        searchField.leftView = iView;
    }
    
    //外部背景
    UIView *outView = [[UIView alloc] initWithFrame:self.bounds];
    [outView setBackgroundColor:[UIColor orangeColor]];
    [self insertSubview:outView atIndex:1];

}

@end

示图：