Problem updating iphone 3gs to ios 5
Just look at the following example of the Google Maps website on i Phone 4 and i Phone 5.As it is talking the height as a constant, the status bar is not hidden and there is a white bar at the bottom.
Same viewport, icons and techniques for i Phone 4/4S should work properly.Remember, when updating the i OS, you are also updating the Web View: that means that all the native web apps -such as Phone Gap/Apache Cordova apps- and pseudo-browsers such as Google Chrome for i OS are also updated.However if your solution is height-dependent, then you may have a problem.These devices have the same width as i Phone 4/4S but 176 more pixels-height on portrait mode.The new simulator also includes the new Maps application replacing Google Maps by default and Passbook.
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If you are using Responsive Web Design you should not have too much trouble as usually, RWD techniques are using the width and not the height for conditionals.