下载地址：
https://github.com/youngsoft/MyLinearLayout
我们知道，在IOS中我们要想进行视图的各方向的停靠，需要用到autoresizingMask，以及不停的计算应该停靠的位置，，也就是计算frame中的x,y,width,height，这样大量的编码导致计算繁琐而且容易出错，因此我这里推出了另外新的布局模式MyFrameLayout。这个布局可以让子视图实现左中右，上中下，填充等功能的布局，同时还可以设置停靠的布局的位置的边距，我们对子视图扩展出了停靠位置的属性：
@property(nonatomic,assign)MarignGravity marginGravity;
这个属性用来控制子视图停靠在MyFrameLayout的方位，这些方位可以是如下方位的或组合：
MGRAVITY_NONE //不采用停靠模式，而是根据frame的x,y来进行位置的定位
MGRAVITY_HORZ_LEFT //水平居左
MGRAVITY_HORZ_CENTER //水平居中
MGRAVITY_HORZ_RIGHT //水平居右
MGRAVITY_HORZ_FILL //水平填充整个布局，视图会有拉伸
MGRAVITY_VERT_TOP //垂直居上
MGRAVITY_VERT_CENTER //垂直居中
MGRAVITY_VERT_BOTTOM //垂直居下
MGRAVITY_VERT_FILL //垂直填充整个布局，视图会有拉伸
MGRAVITY_CENTER //整个视图居中
MGRAVITY_FILL //整个视图填满布局视图
除了可以让子视图停靠在布局的方位外，还可以指定子视图离停靠位置的边距，这个可以通过扩展的视图的四个属性：
@property
@property
@property
@property
这四个属性用来设置视图离停靠位置的四个距离。同时MyFrameLayout中还提供一个padding的属性用来控制整体的子视图离自己的边距。
因为这个布局的使用比较简单，下面直接可以看图：
对应的代码如下：
MyFrameLayout *fl = [[MyFrameLayout alloc] initWithFrame:self.view.bounds];fl.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;fl.padding = UIEdgeInsetsMake(20, 20, 20, 20);fl.backgroundColor = [UIColor grayColor];//显示全屏UILabel *fill = UILabel.new;fill.text = @"fill"; // fill.textAlignment = NSTextAlignmentCenter;fill.backgroundColor = [UIColor blueColor];fill.marginGravity = MGRAVITY_FILL;[fl addSubview:fill];//左右填充。UILabel *horzFill = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 0, 120)];horzFill.text = @"Horz Fill";horzFill.textAlignment = NSTextAlignmentCenter;horzFill.backgroundColor = [UIColor greenColor];horzFill.marginGravity = MGRAVITY_HORZ_FILL;[fl addSubview:horzFill];//左右居中UILabel *horzCenter = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 100, 50)];horzCenter.text = @"Horz Center";horzCenter.backgroundColor = [UIColor whiteColor];horzCenter.marginGravity = MGRAVITY_HORZ_CENTER;[fl addSubview:horzCenter];//左上UILabel *topLeft = UILabel.new;topLeft.text = @"topLeft";[topLeft sizeToFit];topLeft.backgroundColor = [UIColor whiteColor];topLeft.marginGravity = MGRAVITY_HORZ_LEFT | MGRAVITY_VERT_TOP;[fl addSubview:topLeft];//左中UILabel *centerLeft = UILabel.new;centerLeft.text = @"centerLeft";[centerLeft sizeToFit];centerLeft.backgroundColor = [UIColor whiteColor];centerLeft.marginGravity = MGRAVITY_HORZ_LEFT | MGRAVITY_VERT_CENTER;[fl addSubview:centerLeft];//左下UILabel *bottomLeft = UILabel.new;bottomLeft.text = @"bottomLeft";[bottomLeft sizeToFit];bottomLeft.backgroundColor = [UIColor whiteColor];bottomLeft.marginGravity = MGRAVITY_HORZ_LEFT | MGRAVITY_VERT_BOTTOM;[fl addSubview:bottomLeft];//中上UILabel *topCenter = UILabel.new;topCenter.text = @"topCenter";[topCenter sizeToFit];topCenter.backgroundColor = [UIColor greenColor];topCenter.marginGravity = MGRAVITY_HORZ_CENTER | MGRAVITY_VERT_TOP;[fl addSubview:topCenter];//中中。UILabel *centerCenter = UILabel.new;centerCenter.text = @"centerCenter";[centerCenter sizeToFit];centerCenter.backgroundColor = [UIColor greenColor];centerCenter.marginGravity = MGRAVITY_HORZ_CENTER | MGRAVITY_VERT_CENTER;[fl addSubview:centerCenter];//中下UILabel *bottomCenter = UILabel.new;bottomCenter.text = @"bottomCenter";[bottomCenter sizeToFit];bottomCenter.backgroundColor = [UIColor greenColor];bottomCenter.marginGravity = MGRAVITY_HORZ_CENTER | MGRAVITY_VERT_BOTTOM;[fl addSubview:bottomCenter];//右上UILabel *topRight = UILabel.new;topRight.text = @"topRight";[topRight sizeToFit];topRight.backgroundColor = [UIColor greenColor];topRight.marginGravity = MGRAVITY_HORZ_RIGHT | MGRAVITY_VERT_TOP;[fl addSubview:topRight];//右中UILabel *centerRight = UILabel.new;centerRight.text = @"centerRight";[centerRight sizeToFit];centerRight.backgroundColor = [UIColor greenColor];centerRight.marginGravity = MGRAVITY_HORZ_RIGHT | MGRAVITY_VERT_CENTER;[fl addSubview:centerRight];UILabel *bottomRight = UILabel.new;bottomRight.text = @"bottomRight";[bottomRight sizeToFit];bottomRight.backgroundColor = [UIColor greenColor];bottomRight.marginGravity = MGRAVITY_HORZ_RIGHT | MGRAVITY_VERT_BOTTOM;[fl addSubview:bottomRight];//居中显示。UILabel *center = UILabel.new;center.text = @"center";[center sizeToFit];center.backgroundColor = [UIColor redColor];center.marginGravity = MGRAVITY_CENTER;center.leftMargin = 30;center.rightMargin = 30;center.topMargin = 30;center.bottomMargin = 30;[fl addSubview:center];[self.view addSubview:fl];从代码中我们可以看到每个视图只需要设置marginGravity的对应的停靠的位置，以及设置对应的xxxMargin边距，还有设置MyFrameLayout的padding值来设置里面里面的子视图离自己的边距。
总结：
对于那些希望固定在某个位置的子视图来说，我们可以通过将视图加入到MyFrameLayout中来实现。
https://github.com/youngsoft/MyLinearLayout
人若软弱就是自己最大的敌人
