iphone上面应用自定义的truetype字体

#import <dlfcn.h>
....

typedef bool (*A_FUNC_TYPE)(const char*);

NSUInteger LOAD_FONT(){
NSUInteger newFontCount = 0;
NSBundle *frameworkBundle = [NSBundle bundleWithIdentifier:@"com.apple.GraphicsServices"];
const char *frameworkPath = [[frameworkBundle executablePath] UTF8String];
if (frameworkPath) {
void *graphicsServices = dlopen(frameworkPath, RTLD_NOLOAD | RTLD_LAZY);
if (graphicsServices) {
A_FUNC_TYPE GSFontAddFromFile = (A_FUNC_TYPE)dlsym(graphicsServices, "GSFontAddFromFile");

if (GSFontAddFromFile)
for (NSString *fontFile in [[NSBundle mainBundle] pathsForResourcesOfType:@"ttf" inDirectory:nil])
newFontCount += GSFontAddFromFile([fontFile UTF8String]);
}
}
printf("NEW FONT COUNT = %d\n",newFontCount);
return newFontCount;
};