1.问题描述
ld: '/Users/zfj_apple/Desktop/EaseMobDemo/EaseMobSDK/lib/libEaseMobClientSDK.a(easemobvideo.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 arm64
错误解析：你添加的SDK（例如：友盟、环信）的二进制库不支持bitcode，但是Xcode默认是支持bitcode的,而且如果支持的话,其中所有的二进制库和framework都必须包含bitcode。
解决办法：
2.问题描述：
Warning: Multiple build commands for output file /Users/zfj_apple/Library/Developer/Xcode/DerivedData/CosFundLife-factdirmepkoabctyvlrqnaectpn/Build/Products/Debug-iphonesimulator/CosFundLife.app/bottom@2x.png
错误解析：工程中有重复引用的文件；
解决办法：删除重复的文件；
3.问题描述：
Undefined symbols for architecture x86_64:
"_OBJC_CLASS_$_LifeHomeModel", referenced from:
objc-class-ref in TCLifeViewController.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
错误解析：找不到这个LifeHomeModel类文件，没有引用上；
解决办法：
4.问题描述：
ld: warning: directory not found for option '-F/Users/zfj_apple/Desktop/CosFundLifeNew/CosFundLife/TCThirdPartySDK/OneApm'
解决办法：
选择工程, 编译的 (targets)
选择 Build Settings 菜单
查找 Library Search Paths 和 Framework Search Paths， 删掉编译报warning的路径即OK
5.问题描述：
Unsupported Configuration: This file is set to build for a version older than the deployment target. Functionality may be limited.
解决办法：
6.问题描述：
warning: could not load any Objective-C class information. This will significantly reduce the quality of type information available.
- (void)setText:(NSString *)text{
self.text = text;
self.nameLabel.text = text;
}解决办法：这是因为self导致了无限循环,改为_text = text;