ACM_Someone like you

    Reachability *r = [Reachability reachabilityForInternetConnection];
    [r startNotifier];
    NetworkStatus netStatus = [r currentReachabilityStatus];
    
    NSArray *fonts = @[@"FZLTZHK--GBK1-0",@"FZLTXHK--GBK1-0"];
    
    for (NSString *font in fonts) {
        NSString *isFontAvailable = [[NSUserDefaults standardUserDefaults] objectForKey:[NSString stringWithFormat:@"FontDownloaded%@",font]];
        if ((netStatus == ReachableViaWiFi && ![isFontAvailable isEqualToString:font]) || [isFontAvailable isEqualToString:font]) {
            [UIFont downloadFont:font];
        }
    }

+ (void)downloadFont:(NSString *)fontName {
    
    UIFont* aFont = [UIFont fontWithName:fontName size:12.];
    // If the font is already downloaded
    if (aFont && ([aFont.fontName compare:fontName] == NSOrderedSame || [aFont.familyName compare:fontName] == NSOrderedSame)) {
        // Go ahead and display the sample text.
        return;
    }
    
    // Create a dictionary with the font's PostScript name.


    NSMutableDictionary *attrs = [NSMutableDictionary dictionaryWithObjectsAndKeys:fontName, kCTFontNameAttribute, nil];
    
    // Create a new font descriptor reference from the attributes dictionary.
    CTFontDescriptorRef desc = CTFontDescriptorCreateWithAttributes((__bridge CFDictionaryRef)attrs);
    // 將字體描述對象放到一個NSMutableArray中
    NSMutableArray *descs = [NSMutableArray arrayWithCapacity:0];
    [descs addObject:(__bridge id)desc];
    CFRelease(desc);
    
    __block BOOL errorDuringDownload = NO;
    
    // Start processing the font descriptor..
    // This function returns immediately, but can potentially take long time to process.
    // The progress is notified via the callback block of CTFontDescriptorProgressHandler type.
    // See CTFontDescriptor.h for the list of progress states and keys for progressParameter dictionary.
    CTFontDescriptorMatchFontDescriptorsWithProgressHandler( (__bridge CFArrayRef)descs, NULL,  ^(CTFontDescriptorMatchingState state, CFDictionaryRef progressParameter) {
        
        NSString *errorMessage;

        DLog( @"state %d - %@", state, progressParameter);
        
//        double progressValue = [[(__bridge NSDictionary *)progressParameter objectForKey:(id)kCTFontDescriptorMatchingPercentage] doubleValue];
        
        if (state == kCTFontDescriptorMatchingDidBegin) {
            dispatch_async( dispatch_get_main_queue(), ^ {
                DLog(@"Begin Matching");
            });
        } else if (state == kCTFontDescriptorMatchingDidFinish) {
            dispatch_async( dispatch_get_main_queue(), ^ {
                
                // Log the font URL in the console
                CTFontRef fontRef = CTFontCreateWithName((__bridge CFStringRef)fontName, 0., NULL);
                CFStringRef fontURL = CTFontCopyAttribute(fontRef, kCTFontURLAttribute);
                DLog(@"%@", (__bridge NSURL*)(fontURL));
                CFRelease(fontURL);
                CFRelease(fontRef);
                
                if (!errorDuringDownload) {
                    [[NSUserDefaults standardUserDefaults] setObject:fontName forKey:[NSString stringWithFormat:@"FontDownloaded%@",fontName]];
                    [[NSUserDefaults standardUserDefaults] synchronize];
                    DLog(@"%@ downloaded", fontName);
                }
            });
        } else if (state == kCTFontDescriptorMatchingWillBeginDownloading) {
            dispatch_async( dispatch_get_main_queue(), ^ {
                DLog(@"Begin Downloading");
            });
        } else if (state == kCTFontDescriptorMatchingDidFinishDownloading) {
            dispatch_async( dispatch_get_main_queue(), ^ {
                DLog(@"Finish downloading");
                // 可以在這里修改UI控件的字體
            });
        } else if (state == kCTFontDescriptorMatchingDownloading) {
            dispatch_async( dispatch_get_main_queue(), ^ {
                //DLog(@"Downloading %.0f%% complete", progressValue);
            });
        } else if (state == kCTFontDescriptorMatchingDidFailWithError) {
            // An error has occurred.
            // Get the error message
            NSError *error = [(__bridge NSDictionary *)progressParameter objectForKey:(id)kCTFontDescriptorMatchingError];
            if (error != nil) {
                errorMessage = [error description];
            } else {
                errorMessage = @"ERROR MESSAGE IS NOT AVAILABLE!";
            }
            // Set our flag 設置標志
            errorDuringDownload = YES;
            
            dispatch_async( dispatch_get_main_queue(), ^ {
                DLog(@"Download error: %@", errorMessage);
            });
        }
        return (bool)YES;
    });
}