Custom Font not working on IOS

Hello, I could not apply my custom font on ios (everything ok on android!). I have my CFGeneralTao-Regular.ttf on the folder app/assets/iphone/fonts/; my style is:

".myClass": {
    color: 'white',
    font: {
        fontSize:'16dip',
        fontFamily: 'CFGeneralTao-Regular'  
    }
}

PostScript Name: CFGeneralTao-Regular Full Name: CF General Tao Regular

ios does not apply the font rule. where am I wrong? thanks