Class: UIRotationGestureRecognizer

Inherits:
UIGestureRecognizer show all

Overview

UIRotationGestureRecognizer is a concrete subclass of UIGestureRecognizer that looks for rotation gestures involving two touches. When the user moves the fingers opposite each other in a circular motion, the underlying view should rotate in a corresponding direction and speed.

Instance Attribute Summary (collapse)

Attributes inherited from UIGestureRecognizer

#cancelsTouchesInView, #delaysTouchesBegan, #delaysTouchesEnded, #delegate, #enabled, #state, #view

Method Summary

Methods inherited from UIGestureRecognizer

#addTarget:action:, #canBePreventedByGestureRecognizer:, #canPreventGestureRecognizer:, #ignoreTouch:forEvent:, #initWithTarget:action:, #locationInView:, #locationOfTouch:inView:, #numberOfTouches, #removeTarget:action:, #requireGestureRecognizerToFail:, #reset, #touchesBegan:withEvent:, #touchesCancelled:withEvent:, #touchesEnded:withEvent:, #touchesMoved:withEvent:

Methods inherited from NSObject

#!, #!=, #!~, #, #==, #===, #=~, #Rational, #__callee__, #__method__, #__send__, #__type__, `, alloc, allocWithZone:, #autoContentAccessingProxy, autoload, autoload?, autorelease_pool, #awakeAfterUsingCoder:, binding, block_given?, caller, cancelPreviousPerformRequestsWithTarget:, cancelPreviousPerformRequestsWithTarget:selector:object:, catch, class, classFallbacksForKeyedArchiver, #classForCoder, #classForKeyedArchiver, classForKeyedUnarchiver, #clone, conformsToProtocol:, #copy, copyWithZone:, #dealloc, #define_singleton_method, description, display, #doesNotRecognizeSelector:, #dup, #enum_for, #eql?, #equal?, #extend, fail, #finalize, format, #forwardInvocation:, #forwardingTargetForSelector:, framework, #freeze, #frozen?, getpass, gets, global_variables, #init, initialize, #initialize_clone, #initialize_copy, #initialize_dup, #inspect, instanceMethodForSelector:, instanceMethodSignatureForSelector:, #instance_eval, #instance_exec, #instance_of?, #instance_variable_defined?, #instance_variable_get, #instance_variable_set, #instance_variables, instancesRespondToSelector:, isSubclassOfClass:, #is_a?, iterator?, #kind_of?, lambda, load, load_bridge_support_file, load_plist, local_variables, loop, #method, #methodForSelector:, #methodSignatureForSelector:, #methods, #mutableCopy, mutableCopyWithZone:, new, #nil?, open, p, #performSelector:onThread:withObject:waitUntilDone:, #performSelector:onThread:withObject:waitUntilDone:modes:, #performSelector:withObject:afterDelay:, #performSelector:withObject:afterDelay:inModes:, #performSelectorInBackground:withObject:, #performSelectorOnMainThread:withObject:waitUntilDone:, #performSelectorOnMainThread:withObject:waitUntilDone:modes:, print, printf, #private_methods, proc, #protected_methods, #public_method, #public_methods, #public_send, putc, puts, raise, rand, readline, readlines, #replacementObjectForCoder:, #replacementObjectForKeyedArchiver:, require, resolveClassMethod:, resolveInstanceMethod:, #respond_to?, #respond_to_missing?, select, #send, setVersion:, #singleton_methods, sprintf, srand, superclass, #taint, #tainted?, #tap, test, throw, #to_plist, #to_s, trace_var, trap, #trust, #untaint, untrace_var, #untrust, #untrusted?, version

Constructor Details

This class inherits a constructor from NSObject

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class NSObject

Instance Attribute Details

- (Float) rotation

The rotation of the gesture in radians. You may set the rotation value to an arbitrary value; however, setting the rotation resets the velocity.The rotation value is a single value that varies over time. It is not the delta value from the last time that the rotation was reported. Apply the rotation value to the state of the view when the gesture is first recognized—do not concatenate the value each time the handler is called.

Returns:

- (Float) velocity (readonly)

The velocity of the rotation gesture in radians per second. (read-only)

Returns: