Add viberation variations to iOS

[ParticleG]

This pull request is for #1904

[slime73]

Android does expose some haptic feedback preset types, but I'm not sure they really have the exact same meanings as iOS, in which case I suppose iOS and Android are sort of incompatible with each other in terms of the types of haptic feedback they expose...

I'm not sure how I feel about having a function which does radically different things (and effectively accepts different parameters) depending on the platform. I guess it was like that a little bit already, but this makes the difference even bigger.

[ParticleG]

Android does expose some haptic feedback preset types, but I'm not sure they really have the exact same meanings as iOS, in which case I suppose iOS and Android are sort of incompatible with each other in terms of the types of haptic feedback they expose...

I'm not sure how I feel about having a function which does radically different things (and effectively accepts different parameters) depending on the platform. I guess it was like that a little bit already, but this makes the difference even bigger.

Well, currently Android would switch between haptic vibration and normal long vibration depends on how long the vibration is, while iOS could only provide a constant 500ms vibration, and that's a big difference. Different platforms accept different params do sounds bad, so I'm considering tweaking iOS's vibration only with the seconds param, as I mentioned in the #1904 . Maybe test it on 4 ~ 5 iphone/android phone I think.