xcode 在 RestKit 中实现 RKReachabilityObserver 的最佳方式
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Best way to implement RKReachabilityObserver in RestKit
提问by Nick
I have written a tab based application in Xcode/RestKit and am attempting to use the RKReachabilityObserver to determine Internet connectivity on the device.
我在 Xcode/RestKit 中编写了一个基于选项卡的应用程序，并尝试使用 RKReachabilityObserver 来确定设备上的 Internet 连接。
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.
理想情况下，我希望在整个应用程序中都有一个可访问性变量（如果可能的话），但目前我的实现是按照下面的代码进行的，并且在我的 4 个选项卡上复制时效果不佳。
If anybody has any suggestions of a better way to do this, I'd really appreciate your comments.
如果有人对更好的方法有任何建议，我将非常感谢您的评论。
View.h
查看.h
@property (nonatomic, retain) RKReachabilityObserver *observer;
View.m
视图.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....
那么在我看来，我只是做....
if (_networkIsAvailable == YES)
{...
I have implemented this over multiple views (which seems to be causing the problem.
我已经在多个视图上实现了这个（这似乎是导致问题的原因。
What is the suggested approach for a multiple-view application?
多视图应用程序的建议方法是什么？
回答by mja
The [RKClient sharedClient] singleton already has a property for that (reachabilityObserver). Feel free to use that one.
[RKClient sharedClient] 单例已经有一个属性（reachabilityObserver）。随意使用那个。
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)
您还可以订阅 RKReachabilityObserver 通知（如果您想在可达性状态改变时采取任何行动）
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(reachabilityStatusChanged:)
name:RKReachabilityDidChangeNotification object:nil];
回答by CTiPKA
Here is some changes in RestKit 0.20 and later. The code of reachability block should looks like:
这是 RestKit 0.20 及更高版本中的一些更改。可达性块的代码应如下所示：
RKObjectManager *manager = [RKObjectManager managerWithBaseURL:[RemoteTools serverUrl]];
[manager.HTTPClient setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {
if (status == AFNetworkReachabilityStatusNotReachable) {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"No network connection"
message:@"You must be connected to the internet to use this app."
delegate:nil
cancelButtonTitle:@"OK"
otherButtonTitles:nil];
[alert show];
}
}];
