SearchBar、Tableview右边的英文A-Z背景色设置为任意颜色

首先来一张效果图如下

1、去掉UISearchBar的背景色代码如下

_searchbar = [[UISearchBar alloc]initWithFrame:CGRectMake(0, navHeight, SCREEN_WIDTH, 40)];
    _searchbar.backgroundColor = [RGB(244, 244, 244)colorWithAlphaComponent:.2f];
    _searchbar.barStyle = UIBarStyleBlackTranslucent;
    _searchbar.barTintColor = [RGB(244, 244, 244)colorWithAlphaComponent:.2f];
    _searchbar.tintColor = [RGB(244, 244, 244)colorWithAlphaComponent:.2f];
    _searchbar.autocorrectionType = UITextAutocorrectionTypeNo;
    _searchbar.autocapitalizationType = UITextAutocapitalizationTypeNone;
    _searchbar.placeholder = (@"Search");
    _searchbar.delegate = self;
    _searchbar.backgroundImage = [self imageWithColor:[UIColor clearColor] size:_searchbar.bounds.size];
    for (UIView *subview in _searchbar.subviews){
        
        if ([subview isKindOfClass:NSClassFromString(@"UISearchBarBackground")]) {
            [subview removeFromSuperview];
            break;
        }

    }

    [self.view addSubview:_searchbar];

上面初始化代码可自行删减设置背景色主要是imageWithColor方法

//取消searchbar背景色
- (UIImage *)imageWithColor:(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;
}

2、去掉TableView右边英文字母的背景色(系统默认为白色)

_mainTBV = [[UITableView alloc]initWithFrame:CGRectMake(0, _searchbar.bottom, SCREEN_WIDTH, SCREEN_HEIGHT-_searchbar.bottom)];
    _mainTBV.dataSource = self;
    _mainTBV.delegate = self;
    _mainTBV.backgroundColor = [UIColor clearColor];
    _mainTBV.separatorStyle = UITableViewCellSeparatorStyleNone;
    [_mainTBV setAllowsMultipleSelection:YES];
    _mainTBV.bounces = NO;
    _mainTBV.sectionIndexBackgroundColor = [UIColor clearColor];
    [self.view addSubview:_mainTBV];

sectionIndexBackgroundColor 就是设置TableView的背景色我这设置成无色

SearchBar、Tableview右边的英文A-Z背景色设置为任意颜色

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