Handle gesture events as ReactiveCocoa signals!
UILongPressGestureRecognizer *recognizer = [UILongPressGestureRecognizer rac_recognizer];
recognizer.minimumPressDuration = 0.2;
[self.view addGestureRecognizer:recognizer];
[[recognizer rac_signal] subscribeNext:^(UILongPressGestureRecognizer *sender){
// Do something with a signal.
}];You can leverage ReactiveCocoa's powerful stream manipulation.
UIPanGestureRecognizer *panRecognizer = [UIPanGestureRecognizer rac_recognizer];
[[[panRecognizer rac_signal]
filter:^BOOL(UIPanGestureRecognizer *pannizer) {
return pannizer.state == UIGestureRecognizerStateEnded;
}]
subscribeNext:^(UIPanGestureRecognizer *recognizer) {
NSLog(@"Panning is end!");
}];This is just an novice example. Mapping / filtering / combining signals will enable you to handle complex gesture state management easier.
Practically, to avoid circular reference, you should weakify self to do something with self in a block. It is recommended to use libextobjc to handle it easier. (https://github.com/jspahrsummers/libextobjc)
@weakify(self);
[[recognizer rac_signal] subscribeNext:^(UILongPressGestureRecognizer *sender){
@strongify(self);
// Do something with a signal and self.
}];pod 'UIGestureRecognizer+ReactiveCocoa'
and import UIGestureRecognizer+ReactiveCocoa.h in your code.
The MIT License (MIT)
Copyright (c) 2014 kaiinui
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.