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[英]React native ios app fails running with the message: reason: '-[RCTRootContentView reactTag]: unrecognized selector sent to instance
[英]React Native iOS Native View send event with proper reactTag
我有一個iOS本機視圖,它是帶有地圖視圖和UIView的UIView。 該地圖有一個名為“ regionDidChangeAnimated”的事件,我想將事件發送到React Native。 但是reactTag是不正確的。
- (UIView *)view
{
CGRect screenRect = [[UIScreen mainScreen] bounds];
UIView *frameView = [[UIView alloc] initWithFrame:screenRect];
CGRect frameRect = frameView.bounds;
MAMapView *mapView;
mapView = [[MAMapView alloc] initWithFrame:frameRect];
self.mapview = mapView;
mapView.delegate = self;
[frameView addSubview:mapView];
RCTFixedPin* pin = [[RCTFixedPin alloc] initWithFrame:CGRectMake(0, 0, screenRect.size.width, 260)];
pin.userInteractionEnabled = NO;
[frameView addSubview:pin];
return frameView;
}
- (void)mapView:(MAMapView *)mapView regionDidChangeAnimated:(BOOL)animated {
if (self.dragging) {
self.dragging = NO;
}
MACoordinateRegion region = mapView.region;
NSDictionary *event = @{
***@"target": ,***
@"region": @{
@"latitude": @(region.center.latitude),
@"longitude": @(region.center.longitude),
@"latitudeDelta": @(region.span.latitudeDelta),
@"longitudeDelta": @(region.span.longitudeDelta),
}
};
[self.bridge.eventDispatcher sendInputEventWithName:@"topChange" body:event];
}
如果您在react-native代碼中查找本機視圖,則它們已實現:
https://github.com/facebook/react-native/tree/master/React/Views
看來文檔過時了,而不是使用:
[self.bridge.eventDispatcher sendInputEventWithName...
您應該執行以下操作:
@property (nonatomic, copy) RCTBubblingEventBlock onTopChange;
self.onTopChange(@{
@"region": @{
@"latitude": @(region.center.latitude),
@"longitude": @(region.center.longitude),
@"latitudeDelta": @(region.span.latitudeDelta),
@"longitudeDelta": @(region.span.longitudeDelta),
}
};
還有一個RCTDirectEventBlock
我不確定它和RCTBubblingEventBlock
什么區別
查看RCTComponent.m
行,它應該為您自動處理目標設置:
// Special case for event handlers
__weak RCTViewManager *weakManager = _manager;
setterBlock = ^(id target, __unused id source, id json) {
__weak id<RCTComponent> weakTarget = target;
((void (*)(id, SEL, id))objc_msgSend)(target, setter, [RCTConvert BOOL:json] ? ^(NSDictionary *body) {
body = [NSMutableDictionary dictionaryWithDictionary:body];
((NSMutableDictionary *)body)[@"target"] = weakTarget.reactTag;
[weakManager.bridge.eventDispatcher sendInputEventWithName:RCTNormalizeInputEventName(name) body:body];
} : nil);
};
同樣在Manager類中,確保添加:
RCT_EXPORT_VIEW_PROPERTY(onTopChange, RCTBubblingEventBlock)
並且不要忘記在您的JSX中實際連接事件:
<MyComponent onTopChange={this.handleOnTopChange}/>
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