我尝试在数组中查找对象，如果成功，我需要将数组中的对象替换为新对象
for (id existingSig in allSignature)
if ([[existingSig objectForKey:@"SignatureName"] isEqualToString:[item objectForKey:@"name"]])
{
[allSignature removeObject:existingSig];
[allSignature addObject:[NSDictionary dictionaryWithObjectsAndKeys:@"1", @"SignatureIsRich", [item objectForKey:@"name"], @"SignatureName", generatedID, @"SignatureUniqueId", nil]];
}
我遇到错误“NSCFArray: 0x100551f10> 在枚举时发生突变”
最佳答案
正如其他人所说，当 MutableArray 被枚举时，你不能改变它。您可以通过在循环后使用两个数组来处理它，其中包含要删除的内容和要添加的内容。
NSMutableArray *remove = [NSMutableArray array];
NSMutableArray *add = [NSMutableArray array];
for (id existingSig in allSignature){
if ([[existingSig objectForKey:@"SignatureName"] isEqualToString:[item objectForKey:@"name"]])
{
// Add to the array of objects to be removed
[remove addObject:existingSig];
// Add to the array of objects to be added
[add addObject:[NSDictionary dictionaryWithObjectsAndKeys:@"1", @"SignatureIsRich", [item objectForKey:@"name"], @"SignatureName", generatedID, @"SignatureUniqueId", nil]];
}
}
[allSignature removeObjectsInArray:remove]; // Remove objects
[allSignature addObjectsFromArray:add]; // Add new objects
关于iphone - NSMutableArray 替换对象，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/10457527/