iPhone / iOS的isEqualToString始终返回false
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我的应用程序中有一个简单的isEqualToString测试，由于某种原因，尽管控制台显示它应该采用真实路径，但它始终采用if语句的错误路径。
这是有问题的代码：
- (void)requestFailed:(ASIHTTPRequest *)request
{
NSError *error = [request error];
NSLog(@\"Program requestFailed with error \'%@\' and reason \'%@\'\", [error localizedDescription], [error localizedFailureReason]);
NSString *errorMessage = [NSString stringWithFormat:@\"%@\",[error localizedDescription]];
if ([[error localizedFailureReason] isEqualToString:@\"(null)\"])
{
}
else
{
errorMessage = [errorMessage stringByAppendingFormat:@\"\\nReason: %@\", [error localizedFailureReason]];
}
[Utils msgBox:@\"Error with Data Download\" message:errorMessage];
}
2011-04-15 14:27:07.341 Program[79087:207] Program requestFailed with error \'The request timed out\' and reason \'(null)\'
2011-04-15 14:27:07.341 Program[79087:207] Displaying a message box with title \'Error with Data Download\' and message \'The request timed out
Reason: (null)\'
没有找到相关结果
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2 个回复
功飘
总是返回false。 如果您需要检查nil，请将您的字符串与nil进行比较，而不是\“（null）\”。if (error != nil) { errorMessage = [errorMessage stringByAppendingFormat:@\"\\nReason: %@\", [error localizedFailureReason]]; }嘘伪
if ( ! [error localizedFailureReason] ) { ... } ...