Read the Apple iPhone Human Interface Guidelines (HIG). The "splash screen" isn't supposed to be for branding or displaying a logo, it's supposed to look like the default condition of the app so it appears to start up quickly.
Making it stay there for longer would be a violation of the HIG.
与恶龙缠斗过久,自身亦成为恶龙；凝视深渊过久,深渊将回以凝视…
