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自定义UISearchBar(粗略,慢慢补全)

自定义UISearchBar(粗略,慢慢补全)

作者: wToFly | 来源:发表于2017-01-09 15:58 被阅读0次
        _searchBar = [[UISearchBar alloc] initWithFrame:CGRectMake(0, (self.navigationController.navigationBar.height - 44) / 2.0, 360, 44)];
        [_searchBar setBackgroundImage:[UIImage getImageWithColor:[UIColor clearColor] size:_searchBar.size]];
        [_searchBar setSearchBarStyle:UISearchBarStyleProminent];
        _searchBar.placeholder = @"搜索商品名称/编号/关键字";
        _searchBar.delegate = self;
        _searchBarTF = [_searchBar valueForKey:@"_searchField"];
        UIImageView *topImageView = [_searchBarTF valueForKey:@"_effectBackgroundTop"];// 获取searchBar 有颜色的imageView 可取值(//_effectBackgroundBottom、_effectBackgroundTop、_systemBackgroundView)
        topImageView.image = [UIImage getImageWithColor:[UIColor colorWithHexString:@"DEE0E2"] size:CGSizeMake(1, 1)];
        _searchBarTF.layer.borderWidth = 1;
        _searchBarTF.layer.borderColor = kC7C7C7.CGColor;
        _searchBarTF.layer.cornerRadius = 5;
        _searchBar.tintColor = k009D77;
        _searchBarTF.clipsToBounds = YES;
    

    当UISearchBar为空时也能点击搜索按钮

    - (BOOL)searchBar:(UISearchBar *)searchBar shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text {
        // 不管什么时候都能点击搜索
        UITextField *searchBarTF = [searchBar valueForKey:@"_searchField"];
        searchBarTF.enablesReturnKeyAutomatically = NO;
        return YES;
    }
    

    附:kC7C7C7、k009D77 为颜色

    + (UIImage *)getImageWithColor:(UIColor *)color size:(CGSize)size {
        CGRect rect = CGRectMake(0, 0, size.width, size.height);
        UIGraphicsBeginImageContext(rect.size);
        CGContextRef context = UIGraphicsGetCurrentContext();
        
        CGContextSetFillColorWithColor(context, [color CGColor]);
        CGContextFillRect(context, rect);
        
        UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
        UIGraphicsEndImageContext();
        
        return image;
    
    }
    
    + (UIColor *)colorWithHexString:(NSString *)color {
        NSString *cString = [[color stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] uppercaseString];
        
        // String should be 6 or 8 characters
        if ([cString length] < 6) {
            return [UIColor clearColor];
        }
        
        // strip 0X if it appears
        if ([cString hasPrefix:@"0X"])
            cString = [cString substringFromIndex:2];
        if ([cString hasPrefix:@"#"])
            cString = [cString substringFromIndex:1];
        if ([cString length] != 6)
            return [UIColor clearColor];
        
        // Separate into r, g, b substrings
        NSRange range;
        range.location = 0;
        range.length = 2;
        
        //r
        NSString *rString = [cString substringWithRange:range];
        
        //g
        range.location = 2;
        NSString *gString = [cString substringWithRange:range];
        
        //b
        range.location = 4;
        NSString *bString = [cString substringWithRange:range];
        
        // Scan values
        unsigned int r, g, b;
        [[NSScanner scannerWithString:rString] scanHexInt:&r];
        [[NSScanner scannerWithString:gString] scanHexInt:&g];
        [[NSScanner scannerWithString:bString] scanHexInt:&b];
        
        return [UIColor colorWithRed:((float) r / 255.0f) green:((float) g / 255.0f) blue:((float) b / 255.0f) alpha:1.0f];
    
    }
    

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