当我启动React Native应用时，只要连接到Mac，它就总是能够启动。但是一旦我断开iPhone连接，该应用程序大多数情况下会在启动时挂起并崩溃，没有任何进一步的错误消息。但是，其他错误将显示在屏幕上（标有红色和黄色）。当我双击Home按钮时，奇怪的是，应用程序似乎处于已启动状态，但我无法切换到它。如何最好地调试这种行为，并找到导致奇怪的启动行为的问题？更新：我发现了这些错误。
2016-08-08 16:25:23.604 [warn][tid:main][RCTEventEmitter.m:54] Sending `websocketFailed` with no listeners registered.
2016-08-08 16:25:23.612113 PhoenixApp[525:64778] Sending `websocketFailed` with no listeners registered.
2016-08-08 16:25:23.742 [warn][tid:com.facebook.react.JavaScript] The regenerator/runtime module is deprecated; please import regenerator-runtime/runtime instead.
2016-08-08 16:25:23.741927 PhoenixApp[525:65027] The regenerator/runtime module is deprecated; please import regenerator-runtime/runtime instead.
2016-08-08 16:25:23.860 [info][tid:com.facebook.react.JavaScript] Running application "PhoenixApp" with appParams: {"rootTag":1,"initialProps":{}}. __DEV__ === true, development-level warning are ON, performance optimizations are OFF
2016-08-08 16:25:23.860251 PhoenixApp[525:65027] Running application "PhoenixApp" with appParams: {"rootTag":1,"initialProps":{}}. __DEV__ === true, development-level warning are ON, performance optimizations are OFF
2016-08-08 16:25:24.139 [info][tid:com.facebook.react.JavaScript] null
2016-08-08 16:25:24.138808 PhoenixApp[525:65027] null
每秒之后
2016-08-08 16:31:43.159749 PhoenixApp[525:64956] [] __nw_connection_get_connected_socket_block_invoke 176 Connection has no connected handler
2016-08-08 16:31:45.372329 PhoenixApp[525:65445] [] __nw_connection_get_connected_socket_block_invoke 177 Connection has no connected handler
2016-08-08 16:31:47.575208 PhoenixApp[525:64955] [] __nw_connection_get_connected_socket_block_invoke 178 Connection has no connected handler
2016-08-08 16:31:49.788935 PhoenixApp[525:65445] [] __nw_connection_get_connected_socket_block_invoke 179 Connection has no connected handler
2016-08-08 16:31:51.970877 PhoenixApp[525:64955] [] __nw_connection_get_connected_socket_block_invoke 180 Connection has no connected handler
2016-08-08 16:31:54.173791 PhoenixApp[525:65445] [] __nw_connection_get_connected_socket_block_invoke 181 Connection has no connected handler
AppDelegate.m
/**
* Copyright (c) 2015-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*/
#import "AppDelegate.h"
#import "RCTBundleURLProvider.h"
#import "RCTRootView.h"
@implementation AppDelegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
NSURL *jsCodeLocation;
[[RCTBundleURLProvider sharedSettings] setDefaults];
jsCodeLocation = [[RCTBundleURLProvider sharedSettings] jsBundleURLForBundleRoot:@"index.ios" fallbackResource:nil];
RCTRootView *rootView = [[RCTRootView alloc] initWithBundleURL:jsCodeLocation
moduleName:@"PhoenixTrello"
initialProperties:nil
launchOptions:launchOptions];
rootView.backgroundColor = [[UIColor alloc] initWithRed:1.0f green:1.0f blue:1.0f alpha:1];
self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
UIViewController *rootViewController = [UIViewController new];
rootViewController.view = rootView;
self.window.rootViewController = rootViewController;
[self.window makeKeyAndVisible];
return YES;
}
@end
配置:
React Native 命令行工具: 1.0.0 React Native 版本: 0.32.0-rc.0 React 版本: 15.3.0
Xcode 8 beta 4, iOS 10