Event recognition

An electronic device, comprising:

• a display;
• one or more processors;
• and
• memory storing an internal state and one or more programs for execution by the one or more processors, the one or more programs including software that includes a view hierarchy with a plurality of views, wherein the one or more programs include instructions for:
• displaying one or more views of the view hierarchy;
• executing one or more software elements, each software element being associated with a particular view that includes one or more event recognizers, each event recognizer having:
• one or more event definitions based on one or more sub-events, and
• an event handler, wherein the event handler:
• specifies an action for a target, and
• is configured to send the action to the target in response to the event recognizer detecting an event corresponding to a particular event definition of the one or more event definitions;
• detecting a sequence of one or more sub-events;
• identifying a respective view of the view hierarchy as a hit view, wherein the hit view establishes which views in the view hierarchy are actively involved views;
• and
• delivering a respective sub-event to an event recognizer for the respective view, wherein the respective view has a plurality of event definitions for a respective event, one of which is selected in accordance with the internal state of the electronic device, and the respective event recognizer processes the respective sub-event prior to processing a next sub-event in the sequence of sub-events in accordance with the selected event definition, including:
• sending an action to a respective target in response to the event recognizer detecting an event corresponding to a first event definition of the plurality of event definitions when the first event definition has been selected in accordance with the internal state of the electronic device, and
• sending an action to the same respective target in response to the event recognizer detecting an event corresponding to a second event definition, distinct from the first event definition, of the plurality of event definitions when the second event definition has been selected in accordance with the internal state of the electronic device.

A non-transitory computer readable storage medium storing one or more programs for execution by one or more processors in an electronic device that has an internal state, the one or more programs including software that includes a view hierarchy with a plurality of views, wherein the one or more programs include instructions for:

• displaying one or more views of the view hierarchy;
• executing one or more software elements, each software element being associated with a particular view that includes one or more event recognizers, each event recognizer having:
• one or more event definitions based on one or more sub-events, and
• an event handler, wherein the event handler:
• specifies an action for a target, and
• is configured to send the action to the target in response to the event recognizer detecting an event corresponding to a particular event definition of the one or more event definitions;
• detecting a sequence of one or more sub-events;
• identifying a respective view of the view hierarchy as a hit view, wherein the hit view establishes which views in the view hierarchy are actively involved views;
• and
• delivering a respective sub-event to an event recognizer for the respective view, wherein the respective view has a plurality of event definitions for a respective event, one of which is selected in accordance with the internal state of the electronic device, and the respective event recognizer processes the respective sub-event prior to processing a next sub-event in the sequence of sub-events in accordance with the selected event definition, including:
• sending an action to a respective target in response to the event recognizer detecting an event corresponding to a first event definition of the plurality of event definitions when the first event definition has been selected in accordance with the internal state of the electronic device, and
• sending an action to the same respective target in response to the event recognizer detecting an event corresponding to a second event definition, distinct from the first event definition, of the plurality of event definitions when the second event definition has been selected in accordance with the internal state of the electronic device.

A method, comprising:

• at an electronic device with an internal state, the electronic device configured to execute software that includes a view hierarchy with a plurality of views:
• displaying one or more views of the view hierarchy;
• detecting a sequence of sub-events;
• delivering a respective sub-event, in the sequence of sub-events, to multiple event recognizers, wherein a respective event recognizer of the multiple event recognizers has a plurality of event definitions for a respective event;
• selecting one of the plurality of event definitions of the respective event, for the respective event recognizer, in accordance with the internal state of the electronic device;
• processing the sequence of sub-events, with the respective event recognizer, to determine whether the sequence of sub-events matches the selected event definition, including determining whether the sequence of sub-events matches a first event definition of the plurality of event definitions when the first event definition has been selected for the respective event recognizer in accordance with the internal state of the electronic device and determining whether the sequence of sub-events matches a second event definition, distinct from the first event definition, of the plurality of event definitions when the second event definition has been selected for the respective event recognizer in accordance with the internal state of the electronic device;
• and,
• in accordance with a determination that sequence of sub-events matches the selected event definition, activating a respective event handler that corresponds to the respective event recognizer.

An electronic device, comprising:

• a display;
• one or more processors;
• and
• memory storing an internal state and one or more programs for execution by the one or more processors, the one or more programs including instructions for:
• displaying one or more views of a view hierarchy, the view hierarchy including a plurality of views;
• detecting a sequence of sub-events;
• delivering a respective sub-event, in the sequence of sub-events, to multiple event recognizers, wherein a respective event recognizer of the multiple event recognizers has a plurality of event definitions for a respective event;
• selecting one of the plurality of event definitions of the respective event, for the respective event recognizer, in accordance with the internal state of the electronic device;
• processing the sequence of sub-events, with the respective event recognizer, to determine whether the sequence of sub-events matches the selected event definition, including determining whether the sequence of sub-events matches a first event definition of the plurality of event definitions when the first event definition has been selected for the respective event recognizer in accordance with the internal state of the electronic device and determining whether the sequence of sub-events matches a second event definition, distinct from the first event definition, of the plurality of event definitions when the second event definition has been selected for the respective event recognizer in accordance with the internal state of the electronic device;
• and,
• in accordance with a determination that sequence of sub-events matches the selected event definition, activating a respective event handler that corresponds to the respective event recognizer.

A non-transitory computer readable storage medium storing one or more programs for execution by one or more processors in an electronic device that has an internal state, the one or more programs including instructions for:

• displaying one or more views of a view hierarchy, the view hierarchy including a plurality of views;
• detecting a sequence of sub-events;
• delivering a respective sub-event, in the sequence of sub-events, to multiple event recognizers, wherein a respective event recognizer of the multiple event recognizers has a plurality of event definitions for a respective event;
• selecting one of the plurality of event definitions of the respective event, for the respective event recognizer, in accordance with the internal state of the electronic device;
• processing the sequence of sub-events, with the respective event recognizer, to determine whether the sequence of sub-events matches the selected event definition, including determining whether the sequence of sub-events matches a first event definition of the plurality of event definitions when the first event definition has been selected for the respective event recognizer in accordance with the internal state of the electronic device and determining whether the sequence of sub-events matches a second event definition, distinct from the first event definition, of the plurality of event definitions when the second event definition has been selected for the respective event recognizer in accordance with the internal state of the electronic device;
• and,
• in accordance with a determination that sequence of sub-events matches the selected event definition, activating a respective event handler that corresponds to the respective event recognizer.