是getopt_long(3) (和 getopt_long_only(3))的一个简短包装。
使用 CocoaPods
# Podfile
pod 'BRLOptionParser', '~> 0.3.1'// main.m
#import <BRLOptionParser/BRLOptionParser.h>
int main(int argc, const char * argv[])
{
@autoreleasepool {
NSString *name = @"world";
BOOL verbose = NO;
BRLOptionParser *options = [BRLOptionParser new];
[options setBanner:@"usage: %s [-n <name>] [-vh]", argv[0]];
[options addOption:"name" flag:'n' description:@"Your name" argument:&name];
[options addSeparator];
[options addOption:"verbose" flag:'v' description:nil value:&verbose];
__weak typeof(options) weakOptions = options;
[options addOption:"help" flag:'h' description:@"Show this message" block:^{
printf("%s", [[weakOptions description] UTF8String]);
exit(EXIT_SUCCESS);
}];
NSError *error = nil;
if (![options parseArgc:argc argv:argv error:&error]) {
const char * message = error.localizedDescription.UTF8String;
fprintf(stderr, "%s: %s\n", argv[0], message);
exit(EXIT_FAILURE);
}
if (verbose) {
fprintf(stderr, "(Preparing to say hello...)\n");
}
printf("Hello, %s!\n", name.UTF8String);
}
return EXIT_SUCCESS;
}实际上
$ hello
Hello, world!
$ hello -h
usage: hello [-n <name>] [-vh]
-n, --name Your name
-v, --verbose
-h, --help Show this message
$ hello -n
hello: option `-n' requires an argument
$ hello --name Stephen
Hello, Stephen!
$ hello -vngoodbye
(Preparing to say hello...)
Hello, goodbye!
$ hello --goodbye
hello: unrecognized option `--goodbye'
BRLOptionParser 在 MIT 许可证下可用。有关更多信息，请参阅 LICENSE 文件。