iphone - 静态 UILabel 未显示在 uiview 中

Question

我在 Interface Builder 中创建了一些静态 UILabel 文本，但是在运行应用程序时。该标签未显示在应用程序本身中，我不知道为什么。

除了标签之外的所有其他内容(例如文本字段、按钮)都不起作用谁能告诉我出了什么问题吗？

这是在IB中

这是在应用程序中

#import "SettingsViewController.h"

@implementation SettingsViewController

@synthesize drinkLimitText;

// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {

    appDelegate = (DrinkTabsAndNavAppDelegate *)[[UIApplication sharedApplication] delegate];
    [super viewDidLoad];

    NSLog(@"subView:%d",[self.view.subviews count]);
}


- (void) viewWillAppear:(BOOL)animated {


    if ([appDelegate.drinkLimit floatValue] >= 0) 
        drinkLimitText.text = [NSString stringWithFormat:@"%.0f", [appDelegate.drinkLimit floatValue]];
    else 
        drinkLimitText.text = @"0";

    [super viewWillAppear:animated];
}

- (IBAction)textFieldDoneEditing:(id)sender{ 
    NSDecimalNumber *tempValue = [[NSDecimalNumber alloc] initWithString:drinkLimitText.text];
    if (tempValue == [NSDecimalNumber notANumber] || [tempValue doubleValue] < 0) {
        NSString *msg = [[NSString alloc] initWithFormat: @"Make sure to enter a positive number."]; 
        UIAlertView *alert = [[UIAlertView alloc] 
                              initWithTitle:@"Hang on..." 
                              message:msg 
                              delegate:self 
                              cancelButtonTitle:@"Ok" 
                              otherButtonTitles:nil]; 
        [alert show]; 
        [alert release]; 
        [msg release];
    } else {
        [sender resignFirstResponder];
        [self updateDrinkLimit];
    }
    [tempValue release];
} 

- (void)didReceiveMemoryWarning {
    // Releases the view if it doesn't have a superview.
    [super didReceiveMemoryWarning];

    // Release any cached data, images, etc that aren't in use.
}

- (void)viewDidUnload {
    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
}

- (void)updateDrinkLimit {

    NSDecimalNumber *newLimit = [[NSDecimalNumber alloc] initWithString:[drinkLimitText text]];
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    if ([newLimit floatValue] >= 0) {
        [defaults setFloat:[newLimit floatValue] forKey:kDrinkLimitKey]; 
        appDelegate.drinkLimit = newLimit;
    } else {
        [defaults setFloat:0 forKey:kDrinkLimitKey];
        appDelegate.drinkLimit = 0;
    }
    [newLimit release];
}

- (IBAction)openOntrackWebsite {
    [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"http://www.ontrack.org.au/"]];
}

- (void)dealloc {
    [[NSNotificationCenter defaultCenter] removeObserver:self];
    [drinkLimitText release];

    [super dealloc];
}

@end

Answer 1

清理您的项目并再次构建。

这是 Xcode 最常见的问题之一。