UIFont-動態下載系統提供的字型-官方代碼，uifont-下載系統

UIFont-動態下載系統提供的字型-官方代碼，uifont-下載系統

一，工程目錄

 

 

二，AppDelegate.m

 

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    // Override point for customization after application launch.            ViewController *view=[[ViewController alloc]init];    UINavigationController *nav=[[UINavigationController alloc]initWithRootViewController:view];    self.window.backgroundColor=[UIColor whiteColor];    self.window.rootViewController=nav;                return YES;}

 

三，ViewController.h

 

#import <UIKit/UIKit.h>@interface ViewController : UIViewController<UITableViewDelegate,UITableViewDataSource>{    UITableView *myTableView;    NSArray *fontNames;    NSArray *fontSamples;}@end

 

四， ViewController.m

 

#import "ViewController.h"#import <CoreText/CoreText.h>@interface ViewController ()@end@implementation ViewController- (void)viewDidLoad {    [super viewDidLoad];    // Do any additional setup after loading the view, typically from a nib.        //初始化資料    [self addData];    //初始化介面    [self addView];    }#pragma -mark -functions//初始化介面-(void)addView{    myTableView=[[UITableView alloc]initWithFrame:CGRectMake(0, 100, 320, 200)];    myTableView.delegate=self;    myTableView.dataSource=self;    [self.view addSubview:myTableView];}//初始化資料-(void)addData{    fontNames = [[NSArray alloc] initWithObjects:                 @"STXingkai-SC-Light",                 @"DFWaWaSC-W5",                 @"FZLTXHK--GBK1-0",                 @"STLibian-SC-Regular",                 @"LiHeiPro",                 @"HiraginoSansGB-W3",                 nil];    fontSamples = [[NSArray alloc] initWithObjects:                   @"漢體書寫資訊技術標準相",                   @"容檔案下載使用介面簡單",                   @"支援服務升級資訊專業制",                   @"作創意空間快速無線上網",                   @"兙兛兞兝兡兣嗧瓩糎",                   @"㈠㈡㈢㈣㈤㈥㈦㈧㈨㈩",                   nil];}#pragma -mark -UITableViewDelegate- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{    return [fontNames count];}- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{    static NSString *MyIdentifier = @"MyIdentifier";        UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:MyIdentifier];    if (cell == nil) {        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:MyIdentifier];    }    cell.textLabel.text = fontNames[indexPath.row];        return cell;}- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{    [self asynchronouslySetFontName:fontNames[indexPath.row]];}#pragma -mark -functions//字型開始進行下載- (void)asynchronouslySetFontName:(NSString *)fontName{    UIFont* aFont = [UIFont fontWithName:fontName size:12.];    //判斷字型是否已經被下載    if (aFont && ([aFont.fontName compare:fontName] == NSOrderedSame || [aFont.familyName compare:fontName] == NSOrderedSame)) {        NSLog(@"字型已經被下載");        return;    }        //用字型的PostScript名字建立一個Dictionary    NSMutableDictionary *attrs = [NSMutableDictionary dictionaryWithObjectsAndKeys:fontName, kCTFontNameAttribute, nil];        // 建立一個字型描述對象CTFontDescriptorRef    CTFontDescriptorRef desc = CTFontDescriptorCreateWithAttributes((__bridge CFDictionaryRef)attrs);        //將字型描述對象放到一個NSMutableArray中    NSMutableArray *descs = [NSMutableArray arrayWithCapacity:0];    [descs addObject:(__bridge id)desc];    CFRelease(desc);        __block BOOL errorDuringDownload = NO;        //開始對字型進行下載    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(), ^ {                NSLog(@"字型已經匹配");                });        } else if (state == kCTFontDescriptorMatchingDidFinish) {            dispatch_async( dispatch_get_main_queue(), ^ {                NSLog(@"字型下載完成");                      // Log the font URL in the console                CTFontRef fontRef = CTFontCreateWithName((__bridge CFStringRef)fontName, 0., NULL);                CFStringRef fontURL = CTFontCopyAttribute(fontRef, kCTFontURLAttribute);                CFRelease(fontURL);                CFRelease(fontRef);                                if (!errorDuringDownload) {                    NSLog(@"%@ downloaded", fontName);                }            });        } else if (state == kCTFontDescriptorMatchingWillBeginDownloading) {            dispatch_async( dispatch_get_main_queue(), ^ {                NSLog(@"字型開始下載");            });        } else if (state == kCTFontDescriptorMatchingDidFinishDownloading) {            dispatch_async( dispatch_get_main_queue(), ^ {                NSLog(@"字型下載完成");                });        } else if (state == kCTFontDescriptorMatchingDownloading) {            dispatch_async( dispatch_get_main_queue(), ^ {                NSLog(@"下載進度");            });        } else if (state == kCTFontDescriptorMatchingDidFailWithError) {            NSLog(@"下載失敗");                        NSError *error = [(__bridge NSDictionary *)progressParameter objectForKey:(id)kCTFontDescriptorMatchingError];            if (error != nil) {                NSLog(@"errorMessage--%@-",[error description]);            } else {                NSLog(@"error message is not available");            }            errorDuringDownload = YES;            dispatch_async( dispatch_get_main_queue(), ^ {                NSLog(@"Download error: %@", [error description]);            });        }                return (bool)YES;    });    }- (void)didReceiveMemoryWarning {    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}@end

 

參考資料：《iOS開發進階》 -唐巧