1、
Undefined symbols for architecture i386:
"_SCNetworkReachabilityCreateWithAddress", referenced from:
"_SCNetworkReachabilityGetFlags", referenced from:
解决办法：添加SystemConfiguration.framework
2.这个是引用NSDataAdditions时出现的bug，
"_deflate", referenced from:
-[NSData(NSDataAdditions) gzipDeflate] in NSDataAdditions.o
"_deflateEnd", referenced from:
-[NSData(NSDataAdditions) gzipDeflate] in NSDataAdditions.o
"_deflateInit2_", referenced from:
-[NSData(NSDataAdditions) gzipDeflate] in NSDataAdditions.o
"_inflate", referenced from:
-[NSData(NSDataAdditions) gzipInflate] in NSDataAdditions.o
"_inflateEnd", referenced from:
-[NSData(NSDataAdditions) gzipInflate] in NSDataAdditions.o
"_inflateInit2_", referenced from:
-[NSData(NSDataAdditions) gzipInflate] in NSDataAdditions.o
解决办法：添加libz.dylib类库
- selector警告
performSelector may cause a leak because its selector is unknown
触发原因
SEL sel = @selector(touch:);
[self performSelector:sel withObject:textField];
解决办法
#import <objc/message.h>
SEL sel = @selector(touch:);
objc_msgSend(self, sel, textField);// textField为touch：后跟的参数，如有多个参数，用','连接即可
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来源自网络
