问题分类：iOS 新特性问题
case现象：
原包app：iOS15.4-正常，iOS14.5-正常
打sdk包：iOS15.4-异常，iOS14.5(越狱/normal)-正常，15.3.1-异常
空sdk-iOS15.4-异常，iOS14.5-正常
Demo-iOS15.4-正常
报错信息：-canOpenURL: failed for URL: "weixin://" - error: "This app is not allowed to query for scheme weixin"
比较差异点：
原包-rs：iOS15.4-正常
空sdk：iOS15.4-异常
Info.plist有差异
原因：原包LSApplicationQueriesSchemes是50个，sdk化后新加了个url，超过50个(cmd+shift+0可查看官方文档canOpenURL:)，该scheme url在列表里面位置超过50就会报错。
If your app is linked against an earlier version of iOS but is running in iOS 9.0 or later, you can call this method up to 50 times. After reaching that limit, subsequent calls always return NO. If the user reinstalls or upgrades the app, iOS resets the limit.
分析
1、下断点
rb canOpenURL
5: regex = 'canOpenURL', locations = 7, resolved = 7, hit count = 0
5.1: where = UIKitCore`-[UIApplication _canOpenURL:publicURLsOnly:], address = 0x0000000183c415f4, resolved, hit count = 0
5.2: where = UIKitCore`-[UIApplication canOpenURL:], address = 0x0000000183c42238, resolved, hit count = 0
5.3: where = UIKitCore`__28-[UIApplication canOpenURL:]_block_invoke, address = 0x0000000183c422dc, resolved, hit count = 0
5.4: where = UIKitCore`-[UISystemShellApplication canOpenURL:], address = 0x0000000183e41a48, resolved, hit count = 0
5.5: where = CoreServices`-[_LSCanOpenURLManager canOpenURL:publicSchemes:privateSchemes:XPCConnection:error:], address = 0x0000000180edf1f4, resolved, hit count = 0
5.6: where = CoreServices`-[_LSDOpenClient canOpenURL:publicSchemes:privateSchemes:completionHandler:], address = 0x0000000180f0c460, resolved, hit count = 0
5.7: where = SearchFoundation`-[SFPunchout(Handwritten) canOpenURL:], address = 0x0000000198029190, resolved, hit count = 0
2、查找库的位置
image list grep | UIKitCore
[ 0] A84E395E-0B00-3162-B1FD-B861CE41349C 0x0000000182daa000 /Users/xx/Library/Developer/Xcode/iOS DeviceSupport/15.5 (19F77)/Symbols/System/Library/PrivateFrameworks/UIKitCore.framework/UIKitCore
image list grep | CoreServices
[ 0] 148CBE3D-FB7E-3611-B855-F460D5DE652F 0x0000000180eaf000 /Users/xx/Library/Developer/Xcode/iOS DeviceSupport/15.5 (19F77)/Symbols/System/Library/Frameworks/CoreServices.framework/CoreServices
3、查看源码
用hopper打开CoreService源码，搜索_LSCanOpenURLManager查看，有如下方法
int -[_LSCanOpenURLManager schemeQueryLimit]() {
return 0x32;
}
总结
1、有异常先找差异点，逐个对比
2、新特性怎么提前预知，先去看官方文档(cmd+shift+0)
3、借助hopper分析底层源码
相关参考
iOSDeviceSupport列表
iOSDeviceSupport路径：/Applications/Xcode/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport
解决Github访问不了
真机源码路径：
~/Library/Developer/Xcode/iOS DeviceSupport/15.5 (19F77)/Symbols/System/Library/Frameworks/CoreServices.framework
LLDB调试利器及高级用法-2个lldb插件
