1: Create PCH File
1.1 File -> New -> File...
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1.2 iOS -> Other -> PCH File -> Next
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1.3 Add a name or default -> select you project!!! -> create
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//
// CancelNSLogTest-PrefixHeader.pch
// CancelNSLogTest
//
// Created by Anter on 5/17/17.
// Copyright © 2017 Anter. All rights reserved.
//
#ifndef CancelNSLogTest_PrefixHeader_pch
#define CancelNSLogTest_PrefixHeader_pch
// Include any system framework and library headers here that should be included in all compilation units.
// You will also need to set the Prefix Header build setting of one or more of your targets to reference this file.
#ifdef DEBUG
#define ANLog(...) NSLog(__VA_ARGS__)
#else
#define ANLog(...)
#endif
#endif /* CancelNSLogTest_PrefixHeader_pch */
1.4 Check the setting...
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2：Deal with the rubbish log in XCode 8.0+:
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// deal with the problem that rubbish log is logging
// OS_ACTIVITY_MODE = disable
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3： Coding ...
in the codes, use
ANLog(@"xxxx = %@", variable)
replace NSLog(@"%@", variable);
Clean project and run ...
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4：test the log ...
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Change the Debug or Release mode and run...
