duplicate symbol _mCollecatView in:

/Users/Rubert/Library/Developer/Xcode/DerivedData/ChengDuHidengDangerManage-bktvlkdyhtfruecsycmmvjohrqul/Build/Intermediates/ChengDuHidengDangerManage.build/Debug-iphoneos/ChengDuHidengDangerManage.build/Objects-normal/arm64/MapViewController.o

/Users/Rubert/Library/Developer/Xcode/DerivedData/ChengDuHidengDangerManage-bktvlkdyhtfruecsycmmvjohrqul/Build/Intermediates/ChengDuHidengDangerManage.build/Debug-iphoneos/ChengDuHidengDangerManage.build/Objects-normal/arm64/DangerMapViewController.o

duplicate symbol _dangerInfoView in:

/Users/Rubert/Library/Developer/Xcode/DerivedData/ChengDuHidengDangerManage-bktvlkdyhtfruecsycmmvjohrqul/Build/Intermediates/ChengDuHidengDangerManage.build/Debug-iphoneos/ChengDuHidengDangerManage.build/Objects-normal/arm64/MapViewController.o

/Users/Rubert/Library/Developer/Xcode/DerivedData/ChengDuHidengDangerManage-bktvlkdyhtfruecsycmmvjohrqul/Build/Intermediates/ChengDuHidengDangerManage.build/Debug-iphoneos/ChengDuHidengDangerManage.build/Objects-normal/arm64/DangerMapViewController.o

duplicate symbol _dangerInfoBtn in:

/Users/Rubert/Library/Developer/Xcode/DerivedData/ChengDuHidengDangerManage-bktvlkdyhtfruecsycmmvjohrqul/Build/Intermediates/ChengDuHidengDangerManage.build/Debug-iphoneos/ChengDuHidengDangerManage.build/Objects-normal/arm64/MapViewController.o

/Users/Rubert/Library/Developer/Xcode/DerivedData/ChengDuHidengDangerManage-bktvlkdyhtfruecsycmmvjohrqul/Build/Intermediates/ChengDuHidengDangerManage.build/Debug-iphoneos/ChengDuHidengDangerManage.build/Objects-normal/arm64/DangerMapViewController.o

duplicate symbol _pointAnnotation in:

/Users/Rubert/Library/Developer/Xcode/DerivedData/ChengDuHidengDangerManage-bktvlkdyhtfruecsycmmvjohrqul/Build/Intermediates/ChengDuHidengDangerManage.build/Debug-iphoneos/ChengDuHidengDangerManage.build/Objects-normal/arm64/MapViewController.o

/Users/Rubert/Library/Developer/Xcode/DerivedData/ChengDuHidengDangerManage-bktvlkdyhtfruecsycmmvjohrqul/Build/Intermediates/ChengDuHidengDangerManage.build/Debug-iphoneos/ChengDuHidengDangerManage.build/Objects-normal/arm64/DangerMapViewController.o

duplicate symbol _userLocation in:

/Users/Rubert/Library/Developer/Xcode/DerivedData/ChengDuHidengDangerManage-bktvlkdyhtfruecsycmmvjohrqul/Build/Intermediates/ChengDuHidengDangerManage.build/Debug-iphoneos/ChengDuHidengDangerManage.build/Objects-normal/arm64/MapViewController.o

/Users/Rubert/Library/Developer/Xcode/DerivedData/ChengDuHidengDangerManage-bktvlkdyhtfruecsycmmvjohrqul/Build/Intermediates/ChengDuHidengDangerManage.build/Debug-iphoneos/ChengDuHidengDangerManage.build/Objects-normal/arm64/DangerMapViewController.o

ld: 6 duplicate symbols for architecture arm64

clang: error: linker command failed with exit code 1 (use -v to see invocation)

==============================================

这个问题是由于两个类中有2个相同的全局变量，把一个类中的变量名改下就可以了

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