[OC] 图片平铺

Tip: 

    self.bgImg.image = [self.bgImg.image resizableImageWithCapInsets:UIEdgeInsetsMake(100, 40, 40, 40) resizingMode:UIImageResizingModeStretch];

　　

　　UIButton
    UIImage* btnImage = [UIImage imageNamed:@"kk_game_fuli_list_btn"];
    btnImage = [ btnImage resizableImageWithCapInsets:UIEdgeInsetsMake(5, 5, 5, 5) resizingMode:UIImageResizingModeTile];
    [cell.eventBtn setBackgroundImage:btnImage forState:UIControlStateNormal];