本文为CocoaChina网友天明天投稿
iOS 网络请求中的空类型字符串转换
将网络请求的返回的空数据所有NSNull类型转化成@"" .h 文件
// // NSDictionary+SetNullWithStr.h // Buyers // // Created by 陈小明 on 2017/1/3. // Copyright ? 2017年 wanshenglong. All rights reserved. // #import @interface NSDictionary (SetNullWithStr) /* *把服务器返回的 替换为“” *json表示获取到的带有NULL对象的json数据 *NSDictionary *newDict = [NSDictionary changeType:json]; */ +(id)changeType:(id)myObj; @end
.m 文件
// // NSDictionary+SetNullWithStr.m // Buyers // // Created by 陈小明 on 2017/1/3. // Copyright ? 2017年 wanshenglong. All rights reserved. // #import "NSDictionary+SetNullWithStr.h" @implementation NSDictionary (SetNullWithStr) //将NSDictionary中的Null类型的项目转化成@"" +(NSDictionary *)nullDic:(NSDictionary *)myDic { NSArray *keyArr = [myDic allKeys]; NSMutableDictionary *resDic = [[NSMutableDictionary alloc]init]; for (int i = 0; i < keyArr.count; i ++) { id obj = [myDic objectForKey:keyArr[i]]; obj = [self changeType:obj]; [resDic setObject:obj forKey:keyArr[i]]; } return resDic; } //将NSArray中的Null类型的项目转化成@"" +(NSArray *)nullArr:(NSArray *)myArr { NSMutableArray *resArr = [[NSMutableArray alloc] init]; for (int i = 0; i < myArr.count; i ++) { id obj = myArr[i]; obj = [self changeType:obj]; [resArr addObject:obj]; } return resArr; } //将NSString类型的原路返回 +(NSString *)stringToString:(NSString *)string { return string; } //将Null类型的项目转化成@"" +(NSString *)nullToString { return @""; } //主要方法 //类型识别:将所有的NSNull类型转化成@"" +(id)changeType:(id)myObj { if ([myObj isKindOfClass:[NSDictionary class]]) { return [self nullDic:myObj]; } else if([myObj isKindOfClass:[NSArray class]]) { return [self nullArr:myObj]; } else if([myObj isKindOfClass:[NSString class]]) { return [self stringToString:myObj]; } else if([myObj isKindOfClass:[NSNull class]]) { return [self nullToString]; } else { return myObj; } } @end
使用方法:
NSDictionary *dic = (NSDictionary*)responseObject; NSDictionary *newDic = [NSDictionary changeType:dic];