当 ? 时，过滤的 NSArray 无法正常工作。在 NSString 中
当我尝试过滤字符串数组时，我没有得到带有 ? 的值的匹配项。使用filteredArrayUsingPredicate时在其中：。您可以将 URL 替换为带有 ? 的句子。你仍然得到同样的东西。
这是简化的代码：
-(void)test {
NSArray *theURLs = [NSArray arrayWithObjects:@"http://www.google.com", @"http://www.google.com?test=1", nil];
NSString *currentURL = @"http://www.google.com?test=1";
NSLog(@"currentURL %@", currentURL);
NSPredicate *matchURLPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES[cd] %@", [currentURL lowercaseString]];
NSLog(@"match predicate %@", matchURLPredicate);
NSArray *filteredArray = [theURLs filteredArrayUsingPredicate:matchURLPredicate];
NSLog(@"filtered array %@", filteredArray);
if ([filteredArray count]== 0) {
NSLog(@"http://www.google.com?test=1 should have been found, but was not");
} else {
NSLog(@"http://www.google.com?test=1 was found");
}
}
如果我只查找@“http://www.google.com”，它会被过滤得很好。
这是更正后的代码：
-(void)test {
NSArray *theURLs = [NSArray arrayWithObjects:@"http://www.google.com", @"http://www.google.com?test=1", nil];
NSString *currentURL = @"http://www.google.com\\?test=1";
NSLog(@"currentURL %@", currentURL);
NSPredicate *matchURLPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES[cd] %@", [currentURL lowercaseString]];
NSLog(@"match predicate %@", matchURLPredicate);
NSArray *filteredArray = [theURLs filteredArrayUsingPredicate:matchURLPredicate];
NSLog(@"filtered array %@", filteredArray);
if ([filteredArray count]== 0) {
NSLog(@"http://www.google.com?test=1 should have been found, but was not");
} else {
NSLog(@"http://www.google.com?test=1 was found");
}
}
When I try to filter an array of strings I do not get a match for the value that has a ? in it when using filteredArrayUsingPredicate:. You can substitute the URLs for just a sentence with a ? and you still get the same thing.
Here's the simplified code:
-(void)test {
NSArray *theURLs = [NSArray arrayWithObjects:@"http://www.google.com", @"http://www.google.com?test=1", nil];
NSString *currentURL = @"http://www.google.com?test=1";
NSLog(@"currentURL %@", currentURL);
NSPredicate *matchURLPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES[cd] %@", [currentURL lowercaseString]];
NSLog(@"match predicate %@", matchURLPredicate);
NSArray *filteredArray = [theURLs filteredArrayUsingPredicate:matchURLPredicate];
NSLog(@"filtered array %@", filteredArray);
if ([filteredArray count]== 0) {
NSLog(@"http://www.google.com?test=1 should have been found, but was not");
} else {
NSLog(@"http://www.google.com?test=1 was found");
}
}
If I look for just @"http://www.google.com" it is filtered just fine.
Here's the corrected code:
-(void)test {
NSArray *theURLs = [NSArray arrayWithObjects:@"http://www.google.com", @"http://www.google.com?test=1", nil];
NSString *currentURL = @"http://www.google.com\\?test=1";
NSLog(@"currentURL %@", currentURL);
NSPredicate *matchURLPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES[cd] %@", [currentURL lowercaseString]];
NSLog(@"match predicate %@", matchURLPredicate);
NSArray *filteredArray = [theURLs filteredArrayUsingPredicate:matchURLPredicate];
NSLog(@"filtered array %@", filteredArray);
if ([filteredArray count]== 0) {
NSLog(@"http://www.google.com?test=1 should have been found, but was not");
} else {
NSLog(@"http://www.google.com?test=1 was found");
}
}
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?可能是一个特殊字符。只是逃避它：The
?might be a special character. just escape it: