Question

我需要保存个人资料搜索，并允许用户点击它们，而不是再次输入电子邮件地址。我将最近的搜索放在列表的顶部，并试图不让它们复制。出于某种原因，它会在前几次点击时起作用，然后重复它们。任何人都可以建议更清晰，更正确的代码来实现这一目标吗？

enter image description here

如果您点击最近的电子邮件，它将搜索该电子邮件并将其移至顶部。出于某种原因，有时它会在底部留下副本，有时它可以正常工作。

@implementation Search
{
bool badInfo;
bool first;
bool second;
bool third;
bool fourth;
bool fifth;
NSInteger success;
NSString *firstemail;
NSString *secondemail;
NSString *thirdemail;
NSString *fourthemail;
NSString *fifthemail;
NSString *searchEmail;
}

- (void) viewWillAppear:(BOOL)animated {
[super viewWillAppear:YES];
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];

firstemail = [defaults objectForKey:@"firstemail"];
secondemail = [defaults objectForKey:@"secondemail"];
thirdemail = [defaults objectForKey:@"thirdemail"];
fourthemail = [defaults objectForKey:@"fourthemail"];
fifthemail = [defaults objectForKey:@"fifthemail"];
_recentEmailOne.enabled = NO;
_recentEmailTwo.enabled = NO;
_recentEmailThree.enabled = NO;
_recentEmailFour.enabled = NO;
_recentEmailFive.enabled = NO;

if (firstemail) {
    _recentEmailOne.enabled = YES;
    [_recentEmailOne setTitle:firstemail forState:UIControlStateNormal];
}
if (secondemail) {
    _recentEmailTwo.enabled = YES;
    [_recentEmailTwo setTitle:secondemail forState:UIControlStateNormal];
}
if (thirdemail) {
    _recentEmailThree.enabled = YES;
    [_recentEmailThree setTitle:thirdemail forState:UIControlStateNormal];
}
if (fourthemail) {
    _recentEmailFour.enabled = YES;
    [_recentEmailFour setTitle:fourthemail forState:UIControlStateNormal];
}
if (fifthemail) {
    _recentEmailFive.enabled = YES;
    [_recentEmailFive setTitle:fifthemail forState:UIControlStateNormal];
}
_emailInput.text = @"";
_emailInput.delegate = self;


}

- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.



}

- (IBAction)emailOne:(id)sender {
searchEmail = firstemail;
[self doSearch];
}

- (IBAction)emailTwo:(id)sender {
searchEmail = secondemail;
[self doSearch];

}

- (IBAction)emailThree:(id)sender {
searchEmail = thirdemail;
[self doSearch];

}

- (IBAction)emailFour:(id)sender {
searchEmail = fourthemail;
[self doSearch];

}

- (IBAction)emailFive:(id)sender {
searchEmail = fifthemail;
[self doSearch];

}

在我保存信息的搜索结果中。这就是问题所在。

//save data
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
[defaults setObject:searchEmail forKey:@"firstemail"];

if (fifthemail) {
    if ([fifthemail isEqualToString:searchEmail]) {
        fifthemail = nil;
    } else {
        fifth = YES;
    }
}

if (fourthemail) {
    if ([fourthemail isEqualToString:searchEmail]) {
        fourthemail = nil;
    } else {
        fourth =  YES;
    }
}

if (thirdemail) {
    if ([thirdemail isEqualToString:searchEmail]) {
        thirdemail = nil;
    } else {
        third = YES;
    }
}

if (secondemail) {
    if ([secondemail isEqualToString:searchEmail]) {
        secondemail = nil;
    } else {
        second = YES;
    }
}

if (firstemail) {
    if ([firstemail isEqualToString:searchEmail]) {
        firstemail = nil;
    } else {
        first = YES;
    }
}


if (first) {
   [defaults setObject:firstemail forKey:@"secondemail"];
} else if (second) {
   [defaults setObject:secondemail forKey:@"secondemail"];
   second = NO;
}
if (second) {
    [defaults setObject:secondemail forKey:@"thirdemail"];
} else if (third) {
    [defaults setObject:thirdemail forKey:@"thirdemail"];
    third = NO;
} else if (fourth) {
    [defaults setObject:fourthemail forKey:@"thirdemail"];
    fourth = NO;
}

if (third) {
    [defaults setObject:thirdemail forKey:@"fourthemail"];
} else if (fourth) {
    [defaults setObject:fourthemail forKey:@"fourthemail"];
    fourth = NO;
} else if (fifth) {
    [defaults setObject:fifthemail forKey:@"fourthemail"];
    fifth = NO;
}

if (fourth) {
    [defaults setObject:fourthemail forKey:@"fifthemail"];
} else if (fifth) {
    [defaults setObject:fifthemail forKey:@"fifthemail"];
}


if (success == 1) // good login
{
    NSLog(@"Login Success");
    [defaults setObject:searchEmail forKey:@"searchemail"];
    [defaults synchronize];
    [self performSegueWithIdentifier:@"viewprofile" sender:self];

} else if (success == 2) {
    NSLog(@"profile not found");

    [defaults setObject:searchEmail forKey:@"searchemail"];
    [defaults synchronize];
    [self performSegueWithIdentifier:@"notfound" sender:self];
} else {
    NSLog(@"bad information entered");
    NSString *error_msg = (NSString *) [jsonData objectForKey:@"message"];
    [self alertStatus:error_msg :@"Search Failed!"];

}

Answer 1

最天真的方法（不包括你的方法）是这样的：

// Replace newString if found, insert new into top
int match = -1;
int index = 0;
for(NSString * string in historyArray)
{
    if([newString isEqualToString:string])
    {
        match = index;
        break;
    }
    index++;
}
if(match != -1)
    [historyArray removeObjectAtIndex:index];
[historyArray insertObject:newString atIndex:0];

如果您想在上述代码之后限制历史记录的大小：

if(historyArray.count > kSearchHistorySize)
    [historyArray removeLastObject];

以上只有在您一次添加一个字符串时才有效，否则请更换＆＃39; if＆＃39;与＆＃39;而＆＃39;也许

iOS保存最近的搜索并且不要复制它们

1 个答案: