7.1 例子 objective-c

int main(int argc, const char * argv[])
{

    @autoreleasepool {
        //2014-3-5
        unichar data[6] = {97, 98, 99, 100, 101, 102};
        NSString* str = [[NSString alloc] initWithCharacters:data length:6];
        NSLog(@"%@", str);
        
        char* cstr = "Hello, IOS developer!";
        NSString* str2 = [NSString stringWithUTF8String:cstr];
        NSLog(@"%@", str2);
        
        [str2 writeToFile:@"myFile.txt"
            atomically:YES
            encoding:NSUTF8StringEncoding
            error:nil];
        
        NSString* str3 = [NSString stringWithContentsOfFile:@"myFile.txt" encoding:NSUTF8StringEncoding error:nil];
        NSLog(@"%@", str3);int main(int argc, const char * argv[])
{