如果任何值为NULL，则CFPropertyListCreateDeepCopy返回nil

本文介绍了如果任何值为NULL，则CFPropertyListCreateDeepCopy返回nil的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我正在使用以下 CoreFoundation 函数 CFPropertyListCreateDeepCopy： 将不可变对象转换为可变对象。如果任何对象为NULL，则 CFPropertyListCreateDeepCopy 返回空。是否有任何解决方法。

I am using the following CoreFoundation function CFPropertyListCreateDeepCopy: for converting the immutable objects to mutable objects.If any of the object is NULL the CFPropertyListCreateDeepCopy returning empty .Is there any work around for this.

self.packageArray = CFBridgingRelease(CFPropertyListCreateDeepCopy(NULL, (CFPropertyListRef)self.packageArray , kCFPropertyListMutableContainersAndLeaves));

CFPropertyListCreateDeepCopy无法处理包含NSNull的数组/字典

示例代码

NSArray *immutable = @[ @"a", [NSNull null], @"c" ]; NSMutableArray *mutable = (__bridge id)CFPropertyListCreateDeepCopy(kCFAllocatorDefault, (__bridge CFArrayRef)immutable, kCFPropertyListMutableContainers);

来自此链接

提前致谢。

推荐答案

经过几个小时的解决方法，我已经通过以下方式解决了这个问题。

After few hours of workaround, I have solved this issue by below way.

Just将API响应转换为JSON对象时放在下面。

Just place below line when converting API response to JSON Object.

responseString=[responseString stringByReplacingOccurrencesOfString:@"\":null" withString:@"\":\"\""];//To Handle Null Characters //Search for below line in your parsing library and paste above code data = [responseString dataUsingEncoding:NSUTF8StringEncoding];

因此JSON对象中不会出现空字符，因此使用 CFPropertyListCreateDeepCopy 。

So there will be no null characters in your JSON object, hence no issue with using CFPropertyListCreateDeepCopy.

干杯!!