NullableSetter is a NSObject category protecting properties can't be set null.
Inspired by FLCodeInjector: https://github.com/lombax85/FLCodeInjector, this NSObject category auto-generate setter for all encode types of properties, add non-null validation for id type argument, ignore primitive types.
usage:
#import "NSObject+NullableSetter.h"
UserInfo *info = [UserInfo new];
info.name = @"1";
info.url = @"a";
NSLog(@"name = %@, url = %@, gender = %d", info.name, info.url, info.gender);
[info protectNullableSetters];
info.name = nil;
info.url = @"b";
info.gender = YES;
NSLog(@"name = %@, url = %@ gender = %d", info.name, info.url, info.gender);
print:
2015-11-18 15:06:28.799 NullableSetter[26333:2580472] name = 1, url = a, gender = 0
2015-11-18 15:06:28.800 NullableSetter[26333:2580472] name = 1, url = b gender = 1