自定义应用程序默认 NSDictionary
Custom appsDefaults NSDictionary
我正在尝试设置 react-native 应用程序,但我在对 AooDekegate.m
文件进行真正的基本更改时遇到了困难。我没有 xCode 的经验。我不知道我在做什么。
我正在学习本教程 http://www.proreactnative.com/How-to-Develop-iOS-Apps-on-Linux-Using-React-Native/。我开始做 Edit AppDelegate.m
.
你能帮帮我吗?
这是我的代码:
/** * 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 <React/RCTBundleURLProvider.h>
#import <React/RCTRootView.h>
@implementation AppDelegate
NSDictionary *appDefaults = @{ // ERROR !! Initializer element is not a compile-time constant
@"host_preference": @"localhost",
@"port_preference": @"8081",
};
[[NSUserDefaults standardUserDefaults] registerDefaults:appDefaults]; // ERROR !! Expected ']'
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
NSURL *jsCodeLocation;
NSString *host = [[NSUserDefaults standardUserDefaults] stringForKey: @"host_preference"];
NSString *port = [[NSUserDefaults standardUserDefaults] stringForKey: @"port_preference"];
NSString * urlString = [NSString stringWithFormat: @"http://%@:%@/index.ios.bundle?platform=ios&dev=true", host, port];
jsCodeLocation = [NSURL URLWithString: urlString];
RCTRootView *rootView = [[RCTRootView alloc] initWithBundleURL:jsCodeLocation
moduleName:@"AwesomeProject"
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
您确实在函数之外初始化了一个数据对象,这对某些类型来说没问题。
在这种情况下,我宁愿将给定值声明为常量,或者只是在使用变量的方法中声明:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
NSDictionary *appDefaults = @{
@"host_preference": @"localhost",
@"port_preference": @"8081",
};
[[NSUserDefaults standardUserDefaults] registerDefaults:appDefaults];
// Rest of your code
...
}
另外:
如果你以后不需要这些值(我对react native框架不是很了解)。您不必为此使用 NSUserDefaults。 (NSUserDefaults 试图为应用程序保留数据)。
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
NSURL *jsCodeLocation;
NSString *host = @"localhost";
NSString *port = @"8081";
NSString * urlString = [NSString stringWithFormat: @"http://%@:%@/index.ios.bundle?platform=ios&dev=true", host, port];
jsCodeLocation = [NSURL URLWithString: urlString];
RCTRootView *rootView = [[RCTRootView alloc] initWithBundleURL:jsCodeLocation
moduleName:@"AwesomeProject"
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;
}
我正在尝试设置 react-native 应用程序,但我在对 AooDekegate.m
文件进行真正的基本更改时遇到了困难。我没有 xCode 的经验。我不知道我在做什么。
我正在学习本教程 http://www.proreactnative.com/How-to-Develop-iOS-Apps-on-Linux-Using-React-Native/。我开始做 Edit AppDelegate.m
.
你能帮帮我吗?
这是我的代码:
/** * 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 <React/RCTBundleURLProvider.h>
#import <React/RCTRootView.h>
@implementation AppDelegate
NSDictionary *appDefaults = @{ // ERROR !! Initializer element is not a compile-time constant
@"host_preference": @"localhost",
@"port_preference": @"8081",
};
[[NSUserDefaults standardUserDefaults] registerDefaults:appDefaults]; // ERROR !! Expected ']'
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
NSURL *jsCodeLocation;
NSString *host = [[NSUserDefaults standardUserDefaults] stringForKey: @"host_preference"];
NSString *port = [[NSUserDefaults standardUserDefaults] stringForKey: @"port_preference"];
NSString * urlString = [NSString stringWithFormat: @"http://%@:%@/index.ios.bundle?platform=ios&dev=true", host, port];
jsCodeLocation = [NSURL URLWithString: urlString];
RCTRootView *rootView = [[RCTRootView alloc] initWithBundleURL:jsCodeLocation
moduleName:@"AwesomeProject"
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
您确实在函数之外初始化了一个数据对象,这对某些类型来说没问题。
在这种情况下,我宁愿将给定值声明为常量,或者只是在使用变量的方法中声明:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
NSDictionary *appDefaults = @{
@"host_preference": @"localhost",
@"port_preference": @"8081",
};
[[NSUserDefaults standardUserDefaults] registerDefaults:appDefaults];
// Rest of your code
...
}
另外:
如果你以后不需要这些值(我对react native框架不是很了解)。您不必为此使用 NSUserDefaults。 (NSUserDefaults 试图为应用程序保留数据)。
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
NSURL *jsCodeLocation;
NSString *host = @"localhost";
NSString *port = @"8081";
NSString * urlString = [NSString stringWithFormat: @"http://%@:%@/index.ios.bundle?platform=ios&dev=true", host, port];
jsCodeLocation = [NSURL URLWithString: urlString];
RCTRootView *rootView = [[RCTRootView alloc] initWithBundleURL:jsCodeLocation
moduleName:@"AwesomeProject"
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;
}