ourui

//po [[UIWindow keyWindow] recursiveDescription]  //private api

// Recursively travel down the view tree, increasing the indentation level for children
- (void)dumpView:(UIView *)aView atIndent:(int)indent into:(NSMutableString *)outstring
{
    for (int i = 0; i < indent; i++) [outstring appendString:@"--"];
        [outstring appendFormat:@"[%2d] %@\n", indent, [[aView class] description]];
    for (UIView *view in [aView subviews])
        [self dumpView:view atIndent:indent + 1 into:outstring];
}

ourui

        
NSMutableString *ms = [[NSMutableString alloc] initWithString:@"我是中国人"];
        
if (CFStringTransform((__bridge CFMutableStringRef)ms, 0, kCFStringTransformMandarinLatin, NO)) {
        NSLog(@"Pingying: %@", ms); // wǒ shì zhōng guó rén
}
        
if (CFStringTransform((__bridge CFMutableStringRef)ms, 0, kCFStringTransformStripDiacritics, NO)) {
        NSLog(@"Pingying: %@", ms); // wo shi zhong guo ren
}