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iOS崩溃——#45985 NSInternalInconsis

iOS崩溃——#45985 NSInternalInconsis

作者: 水晶屋_Crystal | 来源:发表于2020-07-08 13:46 被阅读0次

    解决方案

    内部矛盾异常,断言评估一个条件,如果条件为 false ,调用当前线程的断点句柄。每一个线程有它自已的断点句柄,它是一个 NSAsserttionHandler 类的对象。当被调用时,断言句柄打印一个错误信息,该条信息中包含了方法名、类名或函数名。然后,它就抛出一个 NSInternalInconsistencyException 异常。

    NSInternalInconsistencyException,从它的字面意思来看的话,是不一致导致的,下面就一些例子

    1. NSMutableDictionary的错误使用

    比如把NSDictionary当做NSMutableDictionary来使用,从他们内部的机理来说,就会产生一些错误,NSMutableDictionary中有很多NSDictionary不支持的接口

    [objc] view plain copy 在CODE上查看代码片派生到我的代码片

    NSString *result = @"{\"username\”:\”aaa\”,\"phone\":\"15666666666\",\"bankcount\":\"98765432112345678\"}";    
    NSData *data = [result dataUsingEncoding:NSUTF8StringEncoding];    
    NSMutableDictionary *info = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:nil];    
    if (info) {    
        NSString *username = [Utils UrlDecode: info[@"username"]];    
        [info  setObject:username forKey:@"username"];    
    }  
    

    执行上述代码后报错:

    [objc] view plain copy 在CODE上查看代码片派生到我的代码片

    *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: '-[__NSCFDictionary setObject:forKey:]: mutating method sent to immutable object'  
    

    出错原因在于:
    [objc] view plain copy 在CODE上查看代码片派生到我的代码片

    [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:nil];  
    

    返回的结果是immutable对象,不能直接对immutable进行赋值操作,否则会报错。

    修改后代码:
    [objc] view plain copy 在CODE上查看代码片派生到我的代码片

    NSString *result = @"{\"username\”:\”aaa\”,\"phone\":\"15666666666\",\"bankcount\":\"98765432112345678\"}";    
    NSData *data = [result dataUsingEncoding:NSUTF8StringEncoding];    
    //----将immutable转换为mutable----    
    NSDictionary *temp = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:nil];    
    NSMutableDictionary *info = [NSMutableDictionary dictionaryWithDictionary:temp];    
    //----------------------    
    if (info) {    
        NSString *username = [Utils UrlDecode:info[@"username"]];    
        [info  setObject:username forKey:@"username"];    
    }   
    

    2. 界面使用不当

    [objc] view plain copy 在CODE上查看代码片派生到我的代码片

    *** Terminating app due to uncaught exception 'NSInternalInconsistencyException',   
    eason: 'Could not load NIB in bundle: 'NSBundle </var/mobile/Applications/74075F37-7B13-4D39-8686-050402501AE0/CanUSee.app> (loaded)' with name 'ViewController''  
    

    其中一个原因是:
    AppDelegate.m的- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions中使用xib文件初始化,但程序的入口是storyboard,didFinishLaunching不需要写东西
    self.viewController = [[ViewController alloc] initWithNibName: @"ViewController" bundle: nil];
    工程里面没有ViewController.xib,初始化出错。

    3.Constant is not finite! That's illegal. constant:nan'

    除数为0时候崩溃

    4. failed to obtain a cell from its dataSource

    CellIdentifier I bet your cellForRowAtIndexPath is returning null.
    应该避免cellForRowAtIndexPath返回的cell为空

    5.对象为nil,不存在

    [MASViewConstraint setSecondViewAttribute:],nil调用约束方法导致崩溃

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