react-native iOS原生模块:异步激活网络指示器的调用方法

// NetworkActivityIndicator.h

#import <React/RCTBridgeModule.h>

@interface NetworkActivityIndicator : NSObject <RCTBridgeModule>

@end

// NetworkActivityIndicator.m

#import "NetworkActivityIndicator.h"
#import <UIKit/UIKit.h>

@implementation NetworkActivityIndicator

RCT_EXPORT_MODULE();

RCT_EXPORT_METHOD(show) {
  dispatch_async(dispatch_get_main_queue(), ^{
    [UIApplication sharedApplication].networkActivityIndicatorVisible = YES;
  });
}

RCT_EXPORT_METHOD(hide) {
  dispatch_async(dispatch_get_main_queue(), ^{
    [UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
  });
}

@end

import { NativeModules } from 'react-native';

const { NetworkActivityIndicator } = NativeModules;

// 显示网络指示器
NetworkActivityIndicator.show();

// 隐藏网络指示器
NetworkActivityIndicator.hide();