使用内置字体就不说了，这里说一下如何下载并使用自定义的字体
第一步，下载字体
首先得要下载ttf文件，下面代码中的dict为
{
id = 23eb3318ae46465f8ffe52e74fb68751;
name = "\U534e\U5eb7\U53ef\U7231\U82f1\U6587\U4f53";
url = "font/2017/04/19/90f8f66d94fe43578bd477700c6de98a.ttf";
}
则URL应为：http://www.zume100.com:8091/app/font/downloadFont?id=23eb3318ae46465f8ffe52e74fb68751
下载时要导入第三方库#import "AFNetworking.h"
NSString * url = [NSString stringWithFormat:@"%@/font/downloadFont?id=%@",[ZumeSysConfig getServerUrl],[dict objectForKey:@"id"]];
NSURL * URL = [NSURL URLWithString:url];
NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
AFURLSessionManager * manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:configuration];
NSURLRequest *request = [NSURLRequest requestWithURL:URL];
NSURLSessionDownloadTask *_downloadTask;
_downloadTask = [manager downloadTaskWithRequest:request progress:nil destination:^NSURL *(NSURL *targetPath, NSURLResponse *response) {
NSString *cachesPath = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject];
NSString * str = [dict objectForKey:@"name"];
NSString *path = [cachesPath stringByAppendingPathComponent:str];
return [NSURL fileURLWithPath:path];
} completionHandler:^(NSURLResponse *response, NSURL *filePath, NSError *error) {
NSString *imgFilePath = [filePath path];
}];
[_downloadTask resume];
}
下载完成，文件地址是imgFilePath
第二部，使用ttf
NSString *imgFilePath = [filePath path];
NSURL *fontUrl = [NSURL fileURLWithPath:imgFilePath];
CGDataProviderRef fontDataProvider = CGDataProviderCreateWithURL((__bridge CFURLRef)fontUrl);
CGFontRef fontRef = CGFontCreateWithDataProvider(fontDataProvider);
CGDataProviderRelease(fontDataProvider);
CTFontManagerRegisterGraphicsFont(fontRef, NULL);
NSString *fontName = CFBridgingRelease(CGFontCopyPostScriptName(fontRef));
label.font = [UIFont fontWithName:fontName size:24];
上面的fontName就是对应下载ttf文件的字体，这样就能直接使用了
