+ (UIFont *)normalHfFontWithSize: (CGFloat)fontSize {return [UIFont isFontDownloaded:@"FZLTXHK--GBK1-0"] ? [UIFont fontWithName:@"FZLTXHK--GBK1-0" size:fontSize] : [UIFont systemFontWithSize:fontSize];
}+ (BOOL)isFontDownloaded:(NSString *)fontName {UIFont* aFont = [UIFont fontWithName:fontName size:12.0];if (aFont && ([aFont.fontName compare:fontName] == NSOrderedSame|| [aFont.familyName compare:fontName] == NSOrderedSame)) {return YES;} else {return NO;}
}

    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 downloadedif (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); // 将字体描述对象放到一个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 consoleCTFontRef 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");                // 可以在这里修改UI控件的字体});} 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 messageNSError *error = [(__bridge NSDictionary *)progressParameter objectForKey:(id)kCTFontDescriptorMatchingError];if (error != nil) {errorMessage = [error description];} else {errorMessage = @"ERROR MESSAGE IS NOT AVAILABLE!";}// Set our flag 设置标志errorDuringDownload = YES;dispatch_async( dispatch_get_main_queue(), ^ {DLog(@"Download error: %@", errorMessage);});}return (bool)YES;});
}