修改UITableViewCell默認(rèn)圖片大小

cell.imageView.image=[UIImage imageNamed:name];
CGSize itemSize = CGSizeMake(24, 24);
UIGraphicsBeginImageContextWithOptions(itemSize, NO, UIScreen.mainScreen.scale);
CGRect imageRect = CGRectMake(0.0, 0.0, itemSize.width, itemSize.height);
[cell.imageView.image drawInRect:imageRect];
cell.imageView.image = UIGraphicsGetImageFromCurrentImageContext();
 UIGraphicsEndImageContext();