Unity3D导出Xcode 8编译

前言

本文基于现有Unity3D项目已经使用XUPorter和Bash脚本在Xcode 7环境下可以正常编译打包。
Unity3D版本5.3.5p8
Xcode版本8.2

Xcode 8 主要变化

Target增加Automatically manage signing选项，勾选可以通过联网自动设置Provision、TeamID等。若不勾选，则需手动分别设置Debug和Release的Provision。
在Xcode 7环境下，使用xcodebuild编译时，只需要指定CODE_SIGN_IDENTITY参数。在Xcode 8环境中，还需要指定PROVISIONING_PROFILE_SPECIFIER和DEVELOPMENT_TEAM。
对证书的权限控制有所修改(猜的)。

主要任务

在执行xcodebuild命令时，增加PROVISIONING_PROFILE_SPECIFIER和DEVELOPMENT_TEAM参数。
Unity3D 生成的Xcode工程，Target没有Automatically manage signing选项，如果没有该选项，在使用xcodebuild进行编译时会提示如下信息。因此，需要在Unity3D生成的Xcode工程里为Target添加Automatically manage signing选项。
```
DemoProject requires a provisioning profile. Select a provisioning profile for the "Debug" build configuration in the project editor.
Code signing is required for product type 'Application' in SDK 'iOS 10.2'  
```

实现

Signing选项

Target的Automatically manage signing选项是保存在ProjectName.xcodeproj/project.pbxproj文件里。例如

/* Begin PBXDictionary section */
29B97313FDCFA39411CA2CEA /* Project object */ = {
    isa = PBXProject;
    attributes = {
        TargetAttributes = {
            5623C57217FDCB0800090B9E /* Unity-iPhone Tests */ = {
                ProvisioningStyle = Manual;
            };
            1D6058900D05DD3D006BFB54 /* Unity-iPhone */ = {
                ProvisioningStyle = Manual;
            };
        };
    };
    buildConfigurationList = C01FCF4E08A954540054247B /* Release */;
    compatibilityVersion = "Xcode 3.2";
    developmentRegion = English;
    hasScannedForEncodings = 1;
    knownRegions = (
        English,
        Japanese,
        French,
        German,
        en,
    );
    mainGroup = 29B97314FDCFA39411CA2CEA /* CustomTemplate */;
    projectDirPath = "";
    projectRoot = "";
    targets = (
        1D6058900D05DD3D006BFB54 /* Unity-iPhone */,
        5623C57217FDCB0800090B9E /* Unity-iPhone Tests */,
    );
};
/* End PBXDictionary section */

ProvisioningStyle这个字段，对应的就是1D6058900D05DD3D006BFB54这个Target的Automatically manage signing选项，它有两个候选值Automatic和Manual。通过Xcode 8建的工程，默认值是Automatic，通过Unity3D生成的Xcode工程，没有这个字段。

通过Unity3D生成的Xcode工程，Project object是下面这个样子的。

/* Begin PBXDictionary section */
29B97313FDCFA39411CA2CEA /* Project object */ = {
    isa = PBXProject;
    attributes = {
        TargetAttributes = {
            5623C57217FDCB0800090B9E /* Unity-iPhone Tests */ = {
                TestTargetID = 1D6058900D05DD3D006BFB54 /* Unity-iPhone */;
            };
        };
    };
    buildConfigurationList = C01FCF4E08A954540054247B /* Release */;
    compatibilityVersion = "Xcode 3.2";
    developmentRegion = English;
    hasScannedForEncodings = 1;
    knownRegions = (
        English,
        Japanese,
        French,
        German,
        en,
    );
    mainGroup = 29B97314FDCFA39411CA2CEA /* CustomTemplate */;
    projectDirPath = "";
    projectRoot = "";
    targets = (
        1D6058900D05DD3D006BFB54 /* Unity-iPhone */,
        5623C57217FDCB0800090B9E /* Unity-iPhone Tests */,
    );
};
/* End PBXDictionary section */

我们需要在TargetAttributes这个属性中，根据targets枚举每一个Target，为每一个Target增加ProvisioningStyle设置。这个任务可以通过XUPorter来实现。代码如下。

PBXProject做如下修改

Index: PBX Editor/PBXProject.cs
===================================================================
--- PBX Editor/PBXProject.cs    (old)
+++ PBX Editor/PBXProject.cs    (new)
@@ -8,6 +8,8 @@
    {
        protected string MAINGROUP_KEY = "mainGroup";
        protected string KNOWN_REGIONS_KEY = "knownRegions";
+       protected string TARGETS_KEY = "targets";
+       protected string ATTRIBUTES_KEY = "attributes";

        protected bool _clearedLoc = false;

@@ -29,6 +31,22 @@
            }
        }

+       public PBXList targets
+       {
+           get
+           {
+               return (PBXList)_data [TARGETS_KEY];
+           }
+       }
+
+       public PBXDictionary attributes
+       {
+           get
+           {
+               return (PBXDictionary)_data [ATTRIBUTES_KEY];
+           }
+       }
+

XCodePostProcess做如下修改

Index: XCodePostProcess.cs
===================================================================
--- XCodePostProcess.cs (old)
+++ XCodePostProcess.cs (new)
@@ -43,7 +43,30 @@
        project.overwriteBuildSetting("GCC_ENABLE_OBJC_EXCEPTIONS", "YES", "Release");
        project.overwriteBuildSetting("GCC_ENABLE_OBJC_EXCEPTIONS", "YES", "Debug");

+       var pbxproj = project.project;

+       var attrs = pbxproj.attributes;
+       var targetAttrs = (PBXDictionary)attrs["TargetAttributes"];
+       PBXDictionary targetSetting = new PBXDictionary ();
+       targetSetting["ProvisioningStyle"] = "Manual";
+       targetSetting["DevelopmentTeam"] = "YourTeamID(Optional)";
+
+       var targets = pbxproj.targets;
+       foreach (var t in targets)
+       {
+           var targetID = (string)t;
+           if (targetAttrs.ContainsKey (targetID))
+           {
+               var TargetAttr = (PBXDictionary)targetAttrs [targetID];
+               TargetAttr.Append (targetSetting);
+           }
+           else
+           {
+               targetAttrs [targetID] = targetSetting;
+           }
+
+       }
+

xcodebuild参数

为xcodebuild增加如下参数:

PROVISIONING_PROFILE_SPECIFIER设置为Provision的名称，区分Debug与Release。
DEVELOPMENT_TEAM设置为证书所属的TeamID。

Tips

之前因为权限问题，将钥匙串中的开发证书都设置成了始终信任，但是在Xcode 8中，会导致签名失败（即使你已经正确设置了Provision），设置成系统默认可以解决这个问题。
Xcode 7的svn版本为1.7.22，Xcode 8的svn版本为1.9.4，新版svn会升级文件格式，故敬慎升级。