My button isn't spreading across my container

Question

I am trying to set my button style that way, it will be spread across my View. Currently its creating white border on the left and on the bottom of my button (see attached screenshot).

My code:

let {width, height} = Dimensions.get('window');
        let photoWidth = width/4;

return (
            <View style={{width: width, height: 500}}>
                <ScrollView style={{width: width, height: height}}>
                    <View style={{flexDirection: 'row', width: width, flexWrap: 'wrap'}}>
                    {
                        this.state.photos.map((p, i) => {
                            return (
                                <SelectedPhoto
                                    key={i}
                                    index={i}
                                    style={{
                                        width: photoWidth,
                                        height: photoWidth,
                                    }}
                                    limit={this.state.supportLength}
                                    photo={p}
                                    onSelectPhoto={this.onSelectPhoto}
                                    onDeselectPhoto={this.onDeselectPhoto}
                                />
                            );
                        })
                    }
                    </View>
                </ScrollView>
                <View style={{ flexDirection:"row", flexWrap: 'wrap', width: width }}>
                    <Button

                        onPress={this.onNext}  
                        containerViewStyle={{width: width}}
                        backgroundColor={Colors.red}
                        title='NEXT' />
                </View>             
            </View>
        );

Answer 1

I consider Button component you used from react-native. Just remove wrapper flex you added as you set width to it.

<Button
   onPress={this.onNext}  
   containerViewStyle={{width: width}}
   backgroundColor={Colors.red}
   title='NEXT' />