被忽視的控制項UIToolbar，忽視控制項UIToolbar

被忽視的控制項UIToolbar，忽視控制項UIToolbar
前言

UIToolbar以前也接觸過，不過沒有怎麼用，久而久之就忘了他的存在，今天看別人源碼的時候看見了，它怎麼很方便，在排列一排視圖的時候不需要我們算裡面的座標就可以輕鬆良好的把布局做出來

代碼

    UIToolbar *tool = [[UIToolbar alloc]initWithFrame:CGRectMake(0, 100, 300, 50)];    tool.layer.borderWidth = 1;    tool.barStyle = UIBarStyleBlack;    tool.backgroundColor = [UIColor blackColor];    [self.view addSubview:tool];            //中間空餘部分    UIBarButtonItem *space = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:NULL];          UIBarButtonItem *previousItem = [[UIBarButtonItem alloc]initWithImage:[[UIImage imageNamed:@"player_pause"]imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal] style:UIBarButtonItemStyleDone target:self action:@selector(previous:)];    UIBarButtonItem *previousItem1 = [[UIBarButtonItem alloc]initWithImage:[[UIImage imageNamed:@"player_pause"]imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal] style:UIBarButtonItemStyleDone target:self action:@selector(previous:)];    UISlider *slider = [[UISlider alloc]initWithFrame:CGRectMake(0, 0, 150, 20)];    UIBarButtonItem *volumnItem = [[UIBarButtonItem alloc]initWithCustomView:slider];        tool.items = @[space,previousItem1,space,volumnItem,space,previousItem];