IndexOfObject返回2147483647

Question

我有一个包含10个项目的数组.当我IndexOfObject为元素编号9 调用" "时,元素编号10 Xcode返回异常:" NSRangeException"

原因:'_ [_ NSCFArray objectAtIndex:]索引:2147483647超出边界(10)'.

从前一个NSLog,我看到数组中存在两个元素,但indexOfObject没有找到它们.为什么？

我的代码是:

    NSDictionary * headConfig =[avatarDictionaryToSave objectForKey:@"head_dictionary"];
    NSString * headImage =[headConfig objectForKey:@"layer_key"];
    NSString * pathFace =[[NSBundle mainBundle]pathForResource:@"Face" ofType:@"plist"];
    NSLog(@"%@", headImage);

    NSArray *arrayFace =[NSArray arrayWithContentsOfFile:pathFace];
    NSLog(@"the  elements are: %@", arrayFace);//here headImage is present
    int index =[arrayFace indexOfObject:headImage];
    NSLog(@"the index is %d", index);

Answer 1

indexOfObject:NSNotFound当对象不在数组中时返回.NSNotFound定义为NSIntegerMax(在iOS 32位上== 2147483647).

因此,您正在寻找的对象似乎不存在.