Abstract: A method includes displaying one or more views of a view hierarchy, and executing software elements associated with a particular view. Each particular view includes event recognizers. Each event recognizer has one or more event definitions, and an event handler that specifies an action for a target and is configured to send the action to the target in response to event recognition. The method includes detecting a sequence of sub-events, and identifying one of the views of the view hierarchy as a hit view that establishes which views are actively involved views. The method includes delivering a respective sub-event to event recognizers for each actively involved view. A respective event recognizer has event definitions, and one of the event definitions is selected based on the internal state. The respective event recognizer processes the respective sub-event prior to processing a next sub-event in the sequence of sub-events.

Abstract: While displaying one or more views of a first software application, an electronic device detects a sequence of touch inputs. The electronic device, in accordance with a determination that at least one gesture recognizer in the first software application recognizes a first portion of the sequence, delivers the sequence to the first software application without delivering the sequence to a second software application, and in accordance with a determination that a first gesture recognizer in the first software application recognizes the sequence, processes the sequence with the first gesture recognizer. The electronic device, in accordance with a determination that no gesture recognizer in the first software application recognizes the first portion, delivers the sequence to the second software application, and in accordance with a determination that a second gesture recognizer in the second software application recognizes the sequence, processes the sequence with the second gesture recognizer.

Abstract: While displaying one or more views of a first software application, an electronic device detects a sequence of touch inputs. The electronic device, in accordance with a determination that at least one gesture recognizer in the first software application recognizes a first portion of the sequence, delivers the sequence to the first software application without delivering the sequence to a second software application, and in accordance with a determination that a first gesture recognizer in the first software application recognizes the sequence, processes the sequence with the first gesture recognizer. The electronic device, in accordance with a determination that no gesture recognizer in the first software application recognizes the first portion, delivers the sequence to the second software application, and in accordance with a determination that a second gesture recognizer in the second software application recognizes the sequence, processes the sequence with the second gesture recognizer.

Abstract: An electronic device executes one or more software elements. Each software element is associated with a particular view, which includes one or more event recognizers. Each event recognizer has one or more event definitions based on one or more sub-events, and an event handler. The event handler is configured to send an action to a target in response to the event recognizer detecting an event corresponding to a particular event definition. The electronic device detects a sequence of sub-events, and identifies actively involved views. The electronic device delivers a respective sub-event to event recognizers for actively involved views. At least one event recognizer for actively involved views has a plurality of event definitions, one of which is selected in accordance with an internal state of the electronic device. The at least one event recognizer processes the respective sub-event in accordance with the selected event definition.

Abstract: A method includes displaying one or more views of a view hierarchy, and executing software elements associated with a particular view. Each particular view includes event recognizers. Each event recognizer has one or more event definitions, and an event handler that specifies an action for a target and is configured to send the action to the target in response to event recognition. The method includes detecting a sequence of sub-events, and identifying one of the views of the view hierarchy as a hit view that establishes which views are actively involved views. The method includes delivering a respective sub-event to event recognizers for each actively involved view. A respective event recognizer has event definitions, and one of the event definitions is selected based on the internal state. The respective event recognizer processes the respective sub-event prior to processing a next sub-event in the sequence of sub-events.