iPhone/iPod Touch: Icon.png: icon dimensions (72 x 72) don't meet the size requirements. The icon file must be 57x57 pixels, in .png format

iPhone/iPod Touch: Icon.png: icon dimensions (72 x 72) don't meet the size requirements. The icon file must be 57x57 pixels, in .png format

Edit Project Settings -> Build -> uncheck Compress PNG Files，就可以了

取得keyboard 座標和寬高（CGRect）

- (void) keyboardWillShow:(NSNotification*) notification

{

    NSDictionary* info = [notification userInfo];

    NSValue* aValue = [info objectForKey:UIKeyboardFrameEndUserInfoKey];

    CGRect keyboardRect = [aValue CGRectValue];

    NSLog(@"keyboardRect y:%f height:%f", keyboardRect.origin.y, keyboardRect.size.height);

}