objective-c - NKAssetDownload addAssetWithRequest apns sigabrt

Question

我通常能够弄清楚为什么 sigabrts 会发生，但我完全被困在这个问题上。我从远程通知启动应用程序，一切正常，直到它到达这段代码:

NKIssue *issueNK = [[NKLibrary sharedLibrary] issueWithName:[issueId stringValue]]; 
if (issueNK == nil) {
    issueNK = [[NKLibrary sharedLibrary] addIssueWithName:[issueId stringValue] date:[NSDate date]];  
}

NSMutableDictionary* settings = [[[NSMutableDictionary alloc] initWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"Settings" ofType:@"plist"]] autorelease];
NSURL *downloadURL = [NSURL URLWithString:
                      [NSString stringWithFormat:[settings objectForKey:@"IssueBundleUrl"], [issue.issueId intValue]]];
NSURLRequest *request = [NSURLRequest requestWithURL:downloadURL];
NKAssetDownload *assetDownload = [issueNK addAssetWithRequest:request]; //sigabrt on this line
[assetDownload downloadWithDelegate:issueListViewController];

在调试器中，issueNK 和 request 似乎都没有问题，不是 nil 或任何东西。

有什么想法吗？谢谢。

Answer 1

我猜你会在该行看到异常的唯一原因是问题是否已经下载或正在下载。所以你需要先检查你的问题的状态:

NKIssue *issueNK = [[NKLibrary sharedLibrary] issueWithName:[issueId stringValue]]; 
if (issueNK == nil) {
    issueNK = [[NKLibrary sharedLibrary] addIssueWithName:[issueId stringValue] date:[NSDate date]];  
}

if ([issueNK status] != NKIssueContentStatusNone)
    return;

NSMutableDictionary* settings = [[[NSMutableDictionary alloc] initWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"Settings" ofType:@"plist"]] autorelease];
NSURL *downloadURL = [NSURL URLWithString:
                  [NSString stringWithFormat:[settings objectForKey:@"IssueBundleUrl"], [issue.issueId intValue]]];
NSURLRequest *request = [NSURLRequest requestWithURL:downloadURL];
NKAssetDownload *assetDownload = [issueNK addAssetWithRequest:request];
[assetDownload downloadWithDelegate:issueListViewController];