1.流式布局MyFlowLayout中的子视图添加了对weight属性的支持，流式布局中的weight属性表示的是剩余空间的占比。通过weight属性的使用，我们可以在很多用线性布局实现的布局，改用流式布局来完成，从而减少布局的嵌套。流式布局具有HTML中的Flex的特性。具体例子见FLLTest4ViewController

 2.布局视图增加了子视图反序排列的功能属性：@Property(nonatomic, assign) BOOL reverseLayout; 这个属性可以按子视图添加的逆顺序进行界面布局。具体例子见：AllTest4ViewController
 3.修正了浮动布局MyFloatLayout中weight计算的问题，由原先的减间距再乘比例改为先乘比例再减间距

Author: @欧柏泉

MyLayout.podspec

@@ -16,7 +16,7 @@ Pod::Spec.new do |s|
   #
 
   s.name         = "MyLayout"
-  s.version      = "1.2.1"
+  s.version      = "1.2.2"
   s.summary      = "A powerful iOS view layout library, suitable for all kinds of screen size. Don't need to learn AutoLayout and SizeClass. "
 
   s.description  = <<-DESC
@@ -79,7 +79,7 @@ Pod::Spec.new do |s|
   #  Supports git, hg, bzr, svn and HTTP.
   #
 
-  s.source       = { :git => "https://github.com/youngsoft/MyLinearLayout.git", :tag => "1.2.1" }
+  s.source       = { :git => "https://github.com/youngsoft/MyLinearLayout.git", :tag => "1.2.2" }
 
 
   # ――― Source Code ―――――――――――――――――――――――――――――――――――――――――――――――――――――――――――――― #

MyLayout.xcodeproj/project.pbxproj

@@ -23,6 +23,7 @@
 		189692701CF74E7E000A5B91 /* AllTest2TableViewCell.m in Sources */ = {isa = PBXBuildFile; fileRef = 1896926F1CF74E7E000A5B91 /* AllTest2TableViewCell.m */; };
 		189692731CF74EA7000A5B91 /* AllTest1TableViewHeaderFooterView.m in Sources */ = {isa = PBXBuildFile; fileRef = 189692721CF74EA7000A5B91 /* AllTest1TableViewHeaderFooterView.m */; };
 		189692761CF74EC5000A5B91 /* AllTestDataModel.m in Sources */ = {isa = PBXBuildFile; fileRef = 189692751CF74EC5000A5B91 /* AllTestDataModel.m */; };
+		18BCC51A1D2D4885005081FF /* FLLTest4ViewController.m in Sources */ = {isa = PBXBuildFile; fileRef = 18BCC5191D2D4885005081FF /* FLLTest4ViewController.m */; };
 		18CFFA2E1D0723970032A789 /* TLTest3ViewController.m in Sources */ = {isa = PBXBuildFile; fileRef = 18CFFA2D1D0723970032A789 /* TLTest3ViewController.m */; };
 		18D684301C4F421400A48BB4 /* AllTest1ViewController.m in Sources */ = {isa = PBXBuildFile; fileRef = 18D683E81C4F421400A48BB4 /* AllTest1ViewController.m */; };
 		18D684311C4F421400A48BB4 /* AllTest2ViewController.m in Sources */ = {isa = PBXBuildFile; fileRef = 18D683EA1C4F421400A48BB4 /* AllTest2ViewController.m */; };
@@ -114,6 +115,8 @@
 		189692721CF74EA7000A5B91 /* AllTest1TableViewHeaderFooterView.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = AllTest1TableViewHeaderFooterView.m; sourceTree = "<group>"; };
 		189692741CF74EBB000A5B91 /* AllTestDataModel.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = AllTestDataModel.h; sourceTree = "<group>"; };
 		189692751CF74EC5000A5B91 /* AllTestDataModel.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = AllTestDataModel.m; sourceTree = "<group>"; };
+		18BCC5181D2D4879005081FF /* FLLTest4ViewController.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = FLLTest4ViewController.h; sourceTree = "<group>"; };
+		18BCC5191D2D4885005081FF /* FLLTest4ViewController.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = FLLTest4ViewController.m; sourceTree = "<group>"; };
 		18CFFA2C1D0723870032A789 /* TLTest3ViewController.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = TLTest3ViewController.h; sourceTree = "<group>"; };
 		18CFFA2D1D0723970032A789 /* TLTest3ViewController.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = TLTest3ViewController.m; sourceTree = "<group>"; };
 		18D683E71C4F421400A48BB4 /* AllTest1ViewController.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; lineEnding = 0; path = AllTest1ViewController.h; sourceTree = "<group>"; xcLanguageSpecificationIdentifier = xcode.lang.objcpp; };
@@ -300,6 +303,8 @@
 				186B83E21D094F11001CA155 /* FLLTest2ViewController.xib */,
 				1830A6071CD6EC2F00FF6B57 /* FLLTest3ViewController.h */,
 				1830A6081CD6EC4500FF6B57 /* FLLTest3ViewController.m */,
+				18BCC5181D2D4879005081FF /* FLLTest4ViewController.h */,
+				18BCC5191D2D4885005081FF /* FLLTest4ViewController.m */,
 				18D683F51C4F421400A48BB4 /* FLTest1ViewController.h */,
 				18D683F61C4F421400A48BB4 /* FLTest1ViewController.m */,
 				18D683F71C4F421400A48BB4 /* FLTest2ViewController.h */,
@@ -540,6 +545,7 @@
 				18D6844E1C4F421400A48BB4 /* RLTest2ViewController.m in Sources */,
 				1890A22F1C6DD71600373B8B /* FLLTest2ViewController.m in Sources */,
 				46D45B161C525FC400A8362C /* MyLayoutSizeClass.m in Sources */,
+				18BCC51A1D2D4885005081FF /* FLLTest4ViewController.m in Sources */,
 				18D6843B1C4F421400A48BB4 /* MyFlowLayout.m in Sources */,
 				18296B751C76D67F00273C3E /* FOLTest3ViewController.m in Sources */,
 				18D684461C4F421400A48BB4 /* LLTest2ViewController.m in Sources */,

MyLayout/AllTest4ViewController.m

@@ -15,6 +15,8 @@ @interface AllTest4ViewController ()
 
 @property(nonatomic, strong) MyLinearLayout *rootLayout;
 
+@property(nonatomic,strong) NSMutableArray *containerLayouts;
+
 
 @end
 
@@ -58,6 +60,8 @@ - (void)viewDidLoad {
     _rootLayout.wrapContentHeight = YES; //布局宽度和父视图一致，高度则由内容包裹。这是实现将布局视图加入滚动条视图并垂直滚动的标准方法。
     [scrollView addSubview:_rootLayout];
 
+    self.containerLayouts = [NSMutableArray new];
+    
     for (NSInteger i = 0; i < sections.count; i++)
     {
         //添加辅助视图
@@ -66,6 +70,7 @@ - (void)viewDidLoad {
         //添加单元格容器视图
         MyFlowLayout *cellContainerLayout = [self createCellContainerLayout:i + 2];
         cellContainerLayout.myBottomMargin = 10;
+        [self.containerLayouts addObject:cellContainerLayout];
         [_rootLayout addSubview:cellContainerLayout];
 
         //添加单元格视图
@@ -80,6 +85,9 @@ - (void)viewDidLoad {
         }
     }
 
+    
+    self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"Reverse" style:UIBarButtonItemStyleDone target:self action:@selector(handleReverse:)];
+    
 }
 
 - (void)didReceiveMemoryWarning {
@@ -178,6 +186,17 @@ -(void)handleCellLayoutTap:(UIView*)sender
     [alertView show];
 }
 
+-(void)handleReverse:(id)sender
+{
+    //MyBaseLayout的属性reverseLayout可以将子视图按照添加的顺序逆序布局。
+    
+    for (MyBaseLayout *layout in self.containerLayouts)
+    {
+        layout.reverseLayout = !layout.reverseLayout;
+        [layout layoutAnimationWithDuration:0.3];
+    }
+}
+
 /*
 #pragma mark - Navigation
 

MyLayout/Base.lproj/LaunchScreen.xib

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.XIB" version="3.0" toolsVersion="9531" systemVersion="14F27" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" useTraitCollections="YES">
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.XIB" version="3.0" toolsVersion="9531" systemVersion="15F34" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" useTraitCollections="YES">
     <dependencies>
         <deployment identifier="iOS"/>
         <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="9529"/>

MyLayout/FLLTest4ViewController.h

@@ -0,0 +1,13 @@
+//
+//  FLLTest4ViewController.h
+//  MyLayout
+//
+//  Created by oybq on 15/10/31.
+//  Copyright (c) 2015年 YoungSoft. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface FLLTest4ViewController : UIViewController
+
+@end