中文字体下载

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController<UITableViewDelegate,UITableViewDataSource>

@property (strong, nonatomic) NSArray *fontNames;
@property (strong, nonatomic) NSArray *fontSamples;
@property (weak, nonatomic) IBOutlet UITableView *fTableView;
@property (weak, nonatomic) IBOutlet UITextView *fTextView;
@property (weak, nonatomic) IBOutlet UIProgressView *fProgressView;
@property (weak, nonatomic) IBOutlet UIActivityIndicatorView *fActivityIndicatorView;

@end

Copyright (C) 2013 Apple Inc. All Rights Reserved.

*/

#import "ViewController.h"
#import <CoreText/CoreText.h>
//下载官方提供的中文字体 demo链接
//https://developer.apple.com/library/ios/samplecode/DownloadFont/Listings/DownloadFont_ViewController_m.html
@interface ViewController ()

@property (strong, nonatomic) NSString *errorMessage;

@end

@implementation ViewController

- (void)asynchronouslySetFontName:(NSString *)fontName
{
UIFont* aFont = [UIFont fontWithName:fontName size:12.];
// If the font is already downloaded//先判断字体是否已经被下载
if (aFont && ([aFont.fontName compare:fontName] == NSOrderedSame || [aFont.familyName compare:fontName] == NSOrderedSame)) {
// Go ahead and display the sample text.
NSUInteger sampleIndex = [_fontNames indexOfObject:fontName];
_fTextView.text = [_fontSamples objectAtIndex:sampleIndex];
_fTextView.font = [UIFont fontWithName:fontName size:24.];
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);

NSMutableArray *descs = [NSMutableArray arrayWithCapacity:0];//将字体描述对象放在可变数组中
[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) {

//NSLog( @"state %d - %@", state, progressParameter);

double progressValue = [[(__bridge NSDictionary *)progressParameter objectForKey:(id)kCTFontDescriptorMatchingPercentage] doubleValue];

if (state == kCTFontDescriptorMatchingDidBegin) {
dispatch_async( dispatch_get_main_queue(), ^ {
// Show an activity indicator
NSLog(@"字体已经匹配");
[_fActivityIndicatorView startAnimating];
_fActivityIndicatorView.hidden = NO;

// Show something in the text view to indicate that we are downloading
_fTextView.text= [NSString stringWithFormat:@"Downloading %@", fontName];
_fTextView.font = [UIFont systemFontOfSize:14.];

NSLog(@"Begin Matching");
});
} else if (state == kCTFontDescriptorMatchingDidFinish) {
dispatch_async( dispatch_get_main_queue(), ^ {
// Remove the activity indicator
[_fActivityIndicatorView stopAnimating];
_fActivityIndicatorView.hidden = YES;

// Display the sample text for the newly downloaded font
NSUInteger sampleIndex = [_fontNames indexOfObject:fontName];
_fTextView.text = [_fontSamples objectAtIndex:sampleIndex];
_fTextView.font = [UIFont fontWithName:fontName size:24.];

// Log the font URL in the console
CTFontRef fontRef = CTFontCreateWithName((__bridge CFStringRef)fontName, 0., NULL);
CFStringRef fontURL = CTFontCopyAttribute(fontRef, kCTFontURLAttribute);
NSLog(@"%@", (__bridge NSURL*)(fontURL));
CFRelease(fontURL);
CFRelease(fontRef);

if (!errorDuringDownload) {
NSLog(@"%@ downloaded", fontName);
}
});
} else if (state == kCTFontDescriptorMatchingWillBeginDownloading) {
dispatch_async( dispatch_get_main_queue(), ^ {
// Show a progress bar
_fProgressView.progress = 0.0;
_fProgressView.hidden = NO;
NSLog(@"Begin Downloading");
});
} else if (state == kCTFontDescriptorMatchingDidFinishDownloading) {
dispatch_async( dispatch_get_main_queue(), ^ {
// Remove the progress bar
_fProgressView.hidden = YES;
NSLog(@"Finish downloading");
});
} else if (state == kCTFontDescriptorMatchingDownloading) {
dispatch_async( dispatch_get_main_queue(), ^ {
// Use the progress bar to indicate the progress of the downloading
[_fProgressView setProgress:progressValue / 100.0 animated:YES];
NSLog(@"下载进度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
errorDuringDownload = YES;

dispatch_async( dispatch_get_main_queue(), ^ {
_fProgressView.hidden = YES;
NSLog(@"下载错误Download error: %@", _errorMessage);
});
}

return (bool)YES;
});

}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [_fontNames count];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *MyIdentifier = @"MyIdentifier";

// Try to retrieve from the table view a now-unused cell with the given identifier.
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:MyIdentifier];

// If no cell is available, create a new one using the given identifier.
if (cell == nil) {
// Use the default cell style.
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:MyIdentifier];
}

// Set up the cell.
cell.textLabel.text = _fontNames[indexPath.row];

return cell;
}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
[self asynchronouslySetFontName:_fontNames[indexPath.row]];

// Dismiss the keyboard in the text view if it is currently displayed
if ([self.fTextView isFirstResponder])
[self.fTextView resignFirstResponder];
}

- (void)viewDidLoad
{
[super viewDidLoad];

self.fontNames = [[NSArray alloc] initWithObjects:
@"STXingkai-SC-Light",
@"DFWaWaSC-W5",
@"FZLTXHK--GBK1-0",
@"STLibian-SC-Regular",
@"LiHeiPro",
@"HiraginoSansGB-W3",
nil];
self.fontSamples = [[NSArray alloc] initWithObjects:
@"汉体书写信息技术标准相",
@"容档案下载使用界面简单",
@"支援服务升级资讯专业制",
@"作创意空间快速无线上网",
@"兙兛兞兝兡兣嗧瓩糎",
@"㈠㈡㈢㈣㈤㈥㈦㈧㈨㈩",
nil];
}

- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}

@end