Newcomers want to get into iPhone, ipad development areas, seeking guidance, thank you

Before I was doing Java development, and now want to go mobile development, mainly for the iPhone, ipad, may I ask what should I learn first, after learning what? What development tools handy, seeking introduction! ! ! Thank you
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MAC development environment to learn one week two weeks OBJECTIVE-C and then do a little something with it. There XCODE
development tools under MACYou know too little. . More to understand some of it

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Before doing java development, why not turn it do android, iPhone, ipad little development in China, but also to turn to c.
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Thank you ......
I am a senior student, there is a practice, now mainly for iPhone, ipad, it must first learn this ...... after also possible to learn android development ......

reference to the second floor jxnktjlfr1 reply:

doing java development, why not switch to android

before it, iPhone, ipad little development in China, but also to steering c.

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Roof. . .