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How can I insert 'info button' to UIToolBar ?
You should use 'UIBarButtonItem' to add some item to UIToolBar.
In example you can create it like below code.
UIBarButtonItem *actionItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAction target:self action:nil];
You can use UIBarButtonSystemItem* but there is no info button.
I noticed there is other init method named 'initWithCustomView'
You can create customized BarButtonItem with it.
I created info button with UIButton like below code.
UIButton *button = [UIButton buttonWithType:UIButtonTypeInfoLight];
[button addTarget:self action:@selector(infoPressed:) forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *infoItem = [[UIBarButtonItem alloc] initWithCustomView:button];
Let's do it !! :)