Question

这个问题已被多次询问，但我已经尝试了所有选项，但它们似乎都没有效果。在我的ios应用程序中，每当我尝试发出警报视图时，都会发生这种情况：

http://i61.tinypic.com/kalnk2.png

我不知道该怎么办。当我单击确定时，我收到此错误:(这是整个错误）

我的代码是：

@implementation AJSettingsViewController
-(NSString*) dataFilePath{
    NSArray *path = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [path objectAtIndex:0];
    return [documentsDirectory stringByAppendingPathComponent:FILENAME];
}

-(void) saveFile{
        NSMutableArray *array = [[NSMutableArray alloc] init];
        [array addObject:country];
    [array addObject:state];
    [array addObject:town];
    [array addObject:zipcode];
    [array addObject:name];



        [array writeToFile:[self dataFilePath] atomically:YES];


    //[array dealloc];
}
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidLoad
{
    zipcodetextfield.translatesAutoresizingMaskIntoConstraints = NO;

    [view setTranslatesAutoresizingMaskIntoConstraints:NO];
    [super viewDidLoad];
    // Do any additional setup after loading the view.
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}
-(IBAction)zipcodelookup:(id)sender{
        [zipcodetextfield resignFirstResponder];
    zipcodetextfield.translatesAutoresizingMaskIntoConstraints = NO;

            zipcode = zipcodetextfield.text;
    if(zipcode.length >0){

        NSString *url = [NSString stringWithFormat:@"http://ziptasticapi.com/%@",zipcode];




        url = [url stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];


        NSURLRequest *req = [NSURLRequest requestWithURL:[NSURL URLWithString: url] cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0];

        NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:req delegate:self];
        [connection start];



        NSError *noconnection;
        NSString *htmlpage = [NSString stringWithContentsOfURL:[NSURL URLWithString: url]                                                                        encoding:NSASCIIStringEncoding
                                                         error:&noconnection];
        //NSLog(htmlpage);

        if ([htmlpage rangeOfString:@"error"].location == NSNotFound) {
            htmlpage = [htmlpage stringByReplacingOccurrencesOfString:@"{" withString:@""];
            htmlpage = [htmlpage stringByReplacingOccurrencesOfString:@"}" withString:@""];
            htmlpage = [htmlpage stringByReplacingOccurrencesOfString:@":" withString:@""];
            htmlpage = [htmlpage stringByReplacingOccurrencesOfString:@"\"" withString:@""];
            htmlpage = [htmlpage stringByReplacingOccurrencesOfString:@"country" withString:@""];
            htmlpage = [htmlpage stringByReplacingOccurrencesOfString:@"city" withString:@""];
            htmlpage = [htmlpage stringByReplacingOccurrencesOfString:@"state" withString:@""];
            NSLog(htmlpage);


        } else {

            zipcodetextfield.text = @"";

            UIAlertView *message = [[UIAlertView alloc] initWithTitle:@"Error"
                                                              message:@"We were unable to locate this zipcode. Please try again"
                                                             delegate:nil
                                                    cancelButtonTitle:@"OK"
                                                    otherButtonTitles:nil];
            message.translatesAutoresizingMaskIntoConstraints = NO;

            [message show];

        }

    }else{
        UIAlertView *message = [[UIAlertView alloc] initWithTitle:@"Error"
                                                          message:@"Please Enter A ZipCode"
                                                         delegate:nil
                                                cancelButtonTitle:@"OK"
                                                otherButtonTitles:nil];
        message.translatesAutoresizingMaskIntoConstraints = NO;

        [message show];

    }
}
-(IBAction)exitkeyboard:(id)sender{
    [zipcodetextfield resignFirstResponder];

}

@end

我绝对会在这里结束，所以任何帮助都会非常感激。

由于

Answer 1

message.translatesAutoresizingMaskIntoConstraints = NO;

不要为UIAlertView设置此项 - 警报视图及其私人经理将决定其布局如何运作。

Answer 2

尝试使用delegate:self代替nil，在.h文件中添加UIAlertViewDelegate，使其如下所示：

@interface AJSettingsViewController : UIViewController <UIAlertViewDelegate>

Answer 3

尝试使用UIAlertController：

UIAlertController *myAlertController = [UIAlertController
                                      alertControllerWithTitle:@"Title"
                                      message:@"Message"
                                      preferredStyle:UIAlertControllerStyleAlert];

带按钮：

UIAlertAction *myCancelAction = [UIAlertAction
                               actionWithTitle:NSLocalizedString(@"Cancel", @"Cancel")
                               style:UIAlertActionStyleCancel
                               handler:^(UIAlertAction *action)
                               {
                                   NSLog(@"Cancel action");
                                   [self someGreatActionWithIndex:0];
                               }];

UIAlertAction *myOkAction = [UIAlertAction
                           actionWithTitle:NSLocalizedString(@"OK", @"OK")
                           style:UIAlertActionStyleDefault
                           handler:^(UIAlertAction *action)
                           {
                               NSLog(@"OK action");
                               [self someGreatActionWithIndex:1];
                           }];

[myAlertController addAction:myCancelAction];
[myAlertController addAction:myOkAction];

希望这有帮助！

UIAlertview错误：无法同时满足约束

3 个答案: