在RestKit中实现RKReachabilityObserver的最佳方法 [英] Best way to implement RKReachabilityObserver in RestKit

问题描述

我在Xcode / RestKit中编写了一个基于标签的应用程序，并尝试使用RKReachabilityObserver来确定设备上的互联网连接。

在我的应用程序中有一个单一的可达性变量（如果这是可能的），但目前我的实现是根据下面的代码，并且在我的4个选项卡上复制不工作。

View.h

如果有人提出更好的方法， p>

  @property（nonatomic，retain）RKReachabilityObserver * observer; 
  

View.m

  @interface AppViewController（）
 {
 RKReachabilityObserver * _observer; 
} 
 @property（nonatomic）BOOL networkIsAvailable; 
 @synthesize observer = _observer; 
 
  - （id）initWithCoder：（NSCoder *）aDecoder {
 
 if（（self = [super initWithCoder：aDecoder]））{
 
 self.observer = [[RKReachabilityObserver alloc] initWithHost：@mydomain]; 
 [[NSNotificationCenter defaultCenter] addObserver：self 
 selector：@selector（reachabilityChanged :) 
 name：RKReachabilityDidChangeNotification 
 object：_observer]; 
} 
 return self; 
} 
 
  - （void）viewDidLoad 
 {
 [super viewDidLoad]; 
 
 //确定网络可用性
 if（！[_observer isReachabilityDetermined]）{
 _networkIsAvailable = YES; 
} 
 else 
 {
 _networkIsAvailable = NO; 
} 
 
 _text.returnKeyType = UIReturnKeyDone; 
 _text.delegate = self; 
} 
 
  - （void）reachabilityChanged：（NSNotification *）notification {
 RKReachabilityObserver * observer =（RKReachabilityObserver *）[notification object]; 
 if（[observer isNetworkReachable]）{
 if（[observer isConnectionRequired]）{
 _networkIsAvailable = YES; 
 NSLog（@Reachable）; 
 return; 
} 
} 
 else 
 {
 _networkIsAvailable = NO; 
 NSLog（@不可达）; 
} 
} 
  

..

  if（_networkIsAvailable == YES）
 {... 
  

我在多个视图上实现了这一点（这似乎是导致问题的原因）。

多视图应用程序的建议方法是什么？

解决方案

[RKClient sharedClient] singleton已经有一个属性

  if（[[[[RKClient sharedClient] reachabilityObserver] isReachabilityDetermined]&&& ; [[RKClient sharedClient] isNetworkReachable]）{
 .... 
} 
  

您还可以订阅RKReachabilityObserver通知（如果您要在可达性状态更改时采取任何操作）

  [[NSNotificationCenter defaultCenter ] addObserver：self 
 selector：@selector（reachabilityStatusChanged :) 
 name：RKReachabilityDidChangeNotification object：nil]; 
  

I have written a tab based application in Xcode/RestKit and am attempting to use the RKReachabilityObserver to determine Internet connectivity on the device.

Ideally I'd like to have a single reachability variable throughout my application (if this is possible) but currently my implementation is as per the code below and does not work very well when replicated over my 4 tabs.

If anybody has any suggestions of a better way to do this, I'd really appreciate your comments.

View.h

@property (nonatomic, retain) RKReachabilityObserver *observer;

View.m

@interface AppViewController()
{
    RKReachabilityObserver *_observer;
}
@property (nonatomic) BOOL networkIsAvailable;
@synthesize observer = _observer;

-(id)initWithCoder:(NSCoder *)aDecoder {

    if ((self = [super initWithCoder:aDecoder])) {

        self.observer = [[RKReachabilityObserver alloc] initWithHost:@"mydomain"];
        [[NSNotificationCenter defaultCenter] addObserver:self
                                                 selector:@selector(reachabilityChanged:)
                                                     name:RKReachabilityDidChangeNotification
                                                   object:_observer];
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];

    // determine network availability
    if (! [_observer isReachabilityDetermined]) {
        _networkIsAvailable = YES;
    }
    else
    {
        _networkIsAvailable = NO;
    }

    _text.returnKeyType = UIReturnKeyDone;
    _text.delegate = self;
}

- (void)reachabilityChanged:(NSNotification *)notification {
    RKReachabilityObserver* observer = (RKReachabilityObserver *) [notification object];
    if ([observer isNetworkReachable]) {
        if ([observer isConnectionRequired]) {
            _networkIsAvailable = YES;
            NSLog(@"Reachable");
            return;
        }
    } 
    else 
    {
        _networkIsAvailable = NO;
        NSLog(@"Not reachable");
    }
}

then anywhere in my view, I simply do....

if (_networkIsAvailable == YES)
    {...

I have implemented this over multiple views (which seems to be causing the problem.

What is the suggested approach for a multiple-view application?

解决方案

The [RKClient sharedClient] singleton already has a property for that (reachabilityObserver). Feel free to use that one.

if ([[[RKClient sharedClient] reachabilityObserver] isReachabilityDetermined] && [[RKClient sharedClient] isNetworkReachable]) {
    ....
}

You can also subscribe to RKReachabilityObserver notifications (if you want to take any action when reachability status changes)

    [[NSNotificationCenter defaultCenter] addObserver:self 
                                             selector:@selector(reachabilityStatusChanged:) 
                                                 name:RKReachabilityDidChangeNotification object:nil];

这篇关于在RestKit中实现RKReachabilityObserver的最佳方法的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！