Iphone CoreAnimation:忽略异常:**-[NSPlaceholderString initWithString:::]:nil参数
此代码导致错误:Iphone CoreAnimation:忽略异常:**-[NSPlaceholderString initWithString:::]:nil参数,iphone,objective-c,ios,xcode,Iphone,Objective C,Ios,Xcode,此代码导致错误: - (NSString *)cachedTwitterOAuthDataForUsername:(NSString *)username { NSString *cache = [NSString stringWithString:[settings objectForKey:@"twitterCache"]]; if (cache.length > 0) { twitterLoginShown = YES; ret
- (NSString *)cachedTwitterOAuthDataForUsername:(NSString *)username
{
NSString *cache = [NSString stringWithString:[settings objectForKey:@"twitterCache"]];
if (cache.length > 0)
{
twitterLoginShown = YES;
return cache;
}
return @" ";
}
由于某些原因,我甚至无法逐行浏览这段代码中的每一行。我不太清楚错误是什么。错误表明
[settings objectForKey:@“twitterCache”]
返回nil
。检查settings
是否包含键@“twitterCache”
的值