使用ReactiveCocoa为UIbutton增加长按功能,实现步进累加效果
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 | UIButton *btn = [UIButton buttonWithType:UIButtonTypeSystem]; @weakify (btn) UILongPressGestureRecognizer *longPressGes = [[UILongPressGestureRecognizer alloc] init]; [btn addGestureRecognizer:longPressGes]; RACSignal *timer = [RACSignal interval:0.1 onScheduler:[RACScheduler mainThreadScheduler]]; RACSignal *longPressGesSignal = [longPressGes rac_gestureSignal]; RACSignal *longPressGesBeganSignal = [longPressGesSignal filter:^ BOOL (UILongPressGestureRecognizer *value) { return value.state == UIGestureRecognizerStateBegan; }]; RACSignal *longPressGesEndedSignal = [longPressGesSignal filter:^ BOOL (UILongPressGestureRecognizer *value) { return value.state == UIGestureRecognizerStateEnded || value.state == UIGestureRecognizerStateCancelled || value.state == UIGestureRecognizerStateFailed ; }]; RACSignal *notifyWhenNeed = [longPressGesBeganSignal flattenMap:^RACStream *( id value) { return [timer takeUntil:longPressGesEndedSignal]; }]; [notifyWhenNeed subscribeNext:^( id x) { @strongify (btn) [btn sendActionsForControlEvents:UIControlEventTouchUpInside]; }]; |
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