记录TableView 常用的一些代码

设置tableview与顶部距离 为 0
self.automaticallyAdjustsScrollViewInsets = NO;

去掉cell之间分割线

self.tableView.separatorStyle = UITableViewCellSeparatorStyleNone;

修改cell的原生图片大小

 UIImage *icon = [UIImage imageNamed:@"sss"];

    CGSize itemSize = CGSizeMake(30, 30);

    UIGraphicsBeginImageContextWithOptions(itemSize, NO ,0.0);

    CGRect imageRect = CGRectMake(0.0, 0.0, itemSize.width, itemSize.height);

    [icon drawInRect:imageRect];

    cell.imageView.image = UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

去掉cell左侧的空白，将分割线变为与屏幕同样大小

self.separatorInset = UIEdgeInsetsZero;

self.layoutMargins = UIEdgeInsetsZero;

self.preservesSuperviewLayoutMargins = NO;