What is difference between uimodaltransitionstyle and uimodalpresentationstyle?

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For uiviewcontroller, We have uimodaltransitionstyle and uimodalpresentationstyle enter link description here Question is what is the difference of them?

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Uimodaltransitionstyle is used to specify how the modal form transitions into view. For example, it can come in vertically, flip horizontal, or do a partial curl. Uimodalpresentationstyle is used to specified whether you want the modal form to be full screen (basically what iPhone uses) or otherwise (therefore only makes sense for iPad) as a page sheet (full, width is the size of the portrait mode screen width), a form sheet (partial width and Partial Height) or current context (I. e. what the parent container uses ).