Register custom download font

gistfile1.m

#import "ViewController.h"

@import CoreText;

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *DocumentsDirPath = paths.lastObject;

    NSURL *fontURL = [NSURL fileURLWithPath:[DocumentsDirPath stringByAppendingPathComponent:@"TTEdit2by3Gothic.ttf"]];

    CFErrorRef error = nil;
    CTFontManagerRegisterFontsForURL((CFURLRef)fontURL, kCTFontManagerScopeNone, &error);

    if (!error) {
        UIFont *font = [UIFont fontWithName:@"TTEdit2/3Gothic" size:20.0];
        NSLog(@"%@", font);

        UILabel *l = [[UILabel alloc] initWithFrame:self.view.frame];
        l.text = @"abcdefg";
        l.font = font;
        
        [self.view addSubview:l];
    }
}

@end