You can use the property_getAttributes function to discover the name, the @encode type string of a property, and other attributes of the property.
The string starts with a T followed by the @encode type and a comma, and
finishes with a V followed by the name of the backing instance variable.
Between these, the attributes are specified by the following descriptors, separated by commas:
20 means the size of the argument frame (20 bytes)，整个方法参数占位的总长度
@0 means that there is an Objective-C object type at byte offset 0 of the argument frame (this is the implicit self object in each Objective-C method)，这个表示在offset为0的地方有一个objective-c的对象，在objective-c method里，首个对象是self自身。
:8 means that there is a selector at byte offset 8 (this is the implicit _cmd in every method, which is the selector that was used to invoke the method). 在offset为8的地方有一个SEL，由于我测试的是64位机器上，所以之前的OC的对象指针占位8个字节。
B16 means 在offset 16的地方，有一个bool类型的参数，由于oc的对象和sel都是指针类型，64位机下所以都是占位8位，这里的bool也就出现在offset16的地方了。至于为什么bool参数占位了4个字节。主要原因是内存对齐的原因
libMobClickLibrary.a(MobClick.o)‘ does not contain bitcode. You must rebuild it with bitcode enabled (Xcode setting ENABLE_BITCODE), obtain an updated library from the vendor, or disable bitcode for this target. for architecture armv7
If you call the “canOpenURL” method on a URL that is not in your whitelist,
it will return “NO”, even if there is an app installed that has registered to handle this scheme. A “This app is not allowed to query for scheme xxx” syslog entry will appear.
If you call the “openURL” method on a URL that is not in your whitelist,
it will fail silently. A “This app is not allowed to query for scheme xxx” syslog entry will appear.
First confusion on my side was about where exactly to set SSH Keys in BitBucket.
I am new to BitBucket and I was setting a Deployment Key which gives read-access only.
So make sure you are setting your rsa pub key in your BitBucket Account Settings.
Click your BitBucket avatar and select Manage account. There you'll be able to set SSH Keys.
I simply deleted the Deployment Key, I don't need any for now. And it worked