ios - 尝试从 didViewAppear 执行 NSLog 时的意外行为

Question

我在类里面有这个设置:

- (void)viewDidAppear:(BOOL)animated
{
    NSLog(@"test");
    NSString *htmlFile = [[NSBundle mainBundle] pathForResource:@"get_business_ideas" ofType:@"html"];
    NSURL *url = [NSURL fileURLWithPath:htmlFile];
    NSURLRequest *rq = [NSURLRequest requestWithURL:url];
    [theWebView loadRequest:rq];
}

NSLog 语句从未出现在我的日志屏幕中，但其余代码似乎有效，因为 uiWebView 确实呈现了。这怎么可能？这是一个新项目，所以也许我必须设置一些东西以确保可以看到日志记录？

谢谢!

更新:这是整个文件:

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];

    if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone)
    {
        //load iphone image
        UIImageView *imgView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"building"]];
        imgView.frame = self.view.bounds; // to set the frame to your view's size
        [self.view addSubview:imgView];
        [self.view sendSubviewToBack:imgView];
    }
    else
    {
        //load ipad image
        UIImageView *imgView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"building@2x"]];
        imgView.frame = self.view.bounds; // to set the frame to your view's size
        [self.view addSubview:imgView];
        [self.view sendSubviewToBack:imgView];
    }

    NSLog(@"2");
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

Answer 1

添加 super 调用是否为您解决了这个问题？

- (void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];
    NSLog(@"test");
    NSString *htmlFile = [[NSBundle mainBundle] pathForResource:@"get_business_ideas" ofType:@"html"];
    NSURL *url = [NSURL fileURLWithPath:htmlFile];
    NSURLRequest *rq = [NSURLRequest requestWithURL:url];
    [theWebView loadRequest:rq];
}

(无论最终如何解决您的问题...请确保在此方法中保留 [super] 调用...根据 API 文档，这是必需的)。

您提到您显示了底部 Pane ，但没有显示任何调试消息。通过单击底部面板上的中间显示图标(不是 Xcode 右上角看起来相似的按钮)，仔细检查除了变量之外还显示了控制台部分: