| 摘要 |
In accordance with some embodiments, a portable electronic device with a touch screen display displays a map in an untracked mode of a mapping application. The device receives location information for the device, and detects a first activation of a mapping mode user interface element. In response, the device enters a tracked mode of the mapping application. While in the tracked mode of the mapping application, the device detects a second activation of the mapping mode user interface element and, in response, enters a heading mode of the mapping application. While in the heading mode of the mapping application, the device detects a finger scrolling gesture and, in response, the device enters the tracked mode when the finger scrolling gesture moves the map less than a predefined amount or the device enters the untracked mode when the finger scrolling gesture moves the map greater than the predefined amount.
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