Update MMScrollPresenter.m

[nwpuhmz]

Hi MitchellMalleo , i updated the file ,adding an UIPageControl .Maybe we should let the user make a decision whether to use the UIPageControl ,but now it's hard -coded .

[MitchellMalleo]

Hey nwpuhmz,

A few things to comment for this pull request. I like the idea giving the user an option to have a UIPageControl, but there are some issues. Its placed awkwardly in-between the titles which adversely effects readability, having it hard-coded isn't ideal; there should be a BOOL named shouldShowPageControl or something along those lines, and the control gives full access to the pageArray so the developer could implement their own UIPageControl and use the addSubview method provided. I'd be more open to a custom UIPageControl that fits the design of the MMScrollPresenter.

Also its generally discouraged to have abbreviated naming conventions in obj-c code. Check out this style guide: https://github.com/raywenderlich/objective-c-style-guide

[nwpuhmz]

Nice advice ！^_^