質問 (リンク)魔女が私の問題に非常に似ていることがわかりました。そして、答えのコードは、私が長い間探していたもののようです:
-(id)init
{
if ([super init])
{
NSString* bundlePath = [[NSBundle mainBundle] bundlePath];
NSString* imageMagickPath = [bundlePath stringByAppendingPathComponent:@"/Contents/Resources/ImageMagick"];
NSString* imageMagickLibraryPath = [imageMagickPath stringByAppendingPathComponent:@"/lib"];
MAGICK_HOME = imageMagickPath;
DYLD_LIBRARY_PATH = imageMagickLibraryPath;
}
return self;
}
-(void)composite
{
NSTask *task = [[NSTask alloc] init];
// the ImageMagick library needs these two environment variables.
NSMutableDictionary* environment = [[NSMutableDictionary alloc] init];
[environment setValue:MAGICK_HOME forKey:@"MAGICK_HOME"];
[environment setValue:DYLD_LIBRARY_PATH forKey:@"DYLD_LIBRARY_PATH"];
// helper function from
// http://www.karelia.com/cocoa_legacy/Foundation_Categories/NSFileManager__Get_.m
NSString* pwd = [Helpers pathFromUserLibraryPath:@"MyApp"];
// executable binary path
NSString* exe = [MAGICK_HOME stringByAppendingPathComponent:@"/bin/composite"];
[task setEnvironment:environment];
[task setCurrentDirectoryPath:pwd]; // pwd
[task setLaunchPath:exe]; // the path to composite binary
// these are just example arguments
[task setArguments:[NSArray arrayWithObjects: @"-gravity", @"center", @"stupid hat.png", @"IDR663.gif", @"bla.png", nil]];
[task launch];
[task waitUntilExit];
}
しかし、それを使用しようとすると、6 つのエラーが発生します。
Use of undeclared identifier 'MAGICK_HOME'
Use of undeclared identifier 'DYLD_LIBRARY_PATH'
Use of undeclared identifier 'MAGICK_HOME'
Use of undeclared identifier 'DYLD_LIBRARY_PATH'
Use of undeclared identifier 'Helpers'
Use of undeclared identifier 'MAGICK_HOME'
どうすれば修正できますか?