版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/u013943420/article/details/82769132
新建CheckNullTool类继承自NSObject，在代码中使用方式：
NSArray *listData = nil;
listData = [CheckNullTool replaceNullData:listData];
NSString *phone = nil;
phone = [CheckNullTool replaceNullData:phone];
#import "CheckNullTool.h"
@implementation CheckNullTool
///主要调用该方法
+ (id)replaceNullData:(id)obj {
if ([obj isKindOfClass:[NSDictionary class]]) {
return [self replaceNullWithDictionary:obj];
} else if ([obj isKindOfClass:[NSArray class]]) {
return [self replaceNullWithArray:obj];
} else if ([obj isKindOfClass:[NSNumber class]]) {
if ([obj isKindOfClass:[NSNull class]] || obj == nil) {
obj = @(0);
}
return obj;
} else if ([obj isKindOfClass:[NSString class]]) {
return [self replaceNullValue:obj];
}
return obj;
}
///处理字典
+ (id)replaceNullWithDictionary:(NSMutableDictionary *)dic {
NSMutableDictionary *tempDic = [NSMutableDictionary dictionary];
NSArray *allKey = [dic allKeys];
for (NSString *key in allKey) {
[tempDic setObject:[self replaceNullData:dic[key]] forKey:key];
}
return tempDic;
}
///处理数组
+ (id)replaceNullWithArray:(NSMutableArray *)arr {
__block NSMutableArray *tempArr = [NSMutableArray array];
[arr enumerateObjectsUsingBlock:^(id _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
[tempArr addObject:[self replaceNullData:obj]];
}];
return tempArr;
}
///处理字符串
+ (NSString *)replaceNullValue: (NSString *)string {
NSString * newStr = [NSString stringWithFormat:@"%@",string];
if ([newStr isKindOfClass:[NSNull class]] ||
newStr == nil ||
[newStr isEqualToString:@"(null)"] ||
[newStr isEqualToString:@""] ||
[newStr isEqualToString:@"null"] ||
[newStr isEqualToString:@"<null>"]) {
newStr = @"";
}
return newStr;
}
@end