Chisel-LLDB调试助手

Chisel is a collection of LLDB commands to assist debugging iOS apps.

在我查阅如何定位视图约束冲突相关博客资料的时候，了解到了Facebook开源的这款LLDB调试工具，通过Chisel可以轻松的找到约束有冲突的视图，自己以前只接触过Xcode自带LLDB工具，用的也不算太多，通过阅读相关文档，发现Chisel有很多实用的功能，比如说打印视图层级关系，通过命令添加断点，打印对象继承关系，预览打开UIImage、CGImageRef图片，显示隐藏视图或layer等等。

目录

• GitHub地址
• 安装
• 常用常用Commands
• 推荐博客

一、GitHub地址

Chisel

二、安装

• 未安装Homrebrew，先安装Homrebrew
  参考MAC上Homebrew常用命令
• 安装Chisel

brew install chisel

• 如果没有创建.lldbinit文件，则在终端创建文件

touch .lldbinit 
//open .lldbinit

• 编辑.lldbinit文件，并添加以下内容command script import /usr/local/opt/chisel/libexec/fblldb.py

vim .lldbinit

//添加以下内容
# ~/.lldbinit
...
command script import /path/to/fblldb.py

最后wq保存，重启Xcode，就可以使用Chisel了。

三、常用Commands

命令	命令描述	iOS	OS X
pviews	Print the recursive view description for the key window.	YES	YES
pvc	Print the recursive view controller description for the key window.	YES	NO
visualize	Open a UIImage, CGImageRef, UIView, CALayer, NSData (of an image), UIColor, CIColor, or CGColorRef in Preview.app on your Mac.	YES	NO
fv	Find a view in the hierarchy whose class name matches the provided regex.	YES	NO
fvc	Find a view controller in the hierarchy whose class name matches the provided regex.	YES	NO
show/hide	Show or hide the given view or layer. You don't even have to continue the process to see the changes!	YES	YES
mask/unmask	Overlay a view or layer with a transparent rectangle to visualize where it is.	YES	NO
border/unborder	Add a border to a view or layer to visualize where it is.	YES	YES
caflush	Flush the render server (equivalent to a "repaint" if no animations are in-flight).	YES	YES
bmessage	Set a symbolic breakpoint on the method of a class or the method of an instance without worrying which class in the hierarchy actually implements the method.	YES	YES
wivar	Set a watchpoint on an instance variable of an object.	YES	YES
presponder	Print the responder chain starting from the given object.	YES	YES
...	...	...	...

就介绍这么多了，现在自己用到的也并不算太多，做下记录，方便自己以后查阅，有兴趣的朋友可以自行了解其用法吧。

推荐博客

1、LLdb篇2教你使用faceBook的chisel来提高调试效率
2、Chisel-LLDB命令插件，让调试更Easy