1.判断字符串是否为空
+ (NSString *)isNullToString:(id)string{ string = [NSString stringWithFormat:@"%@",string]; if ([string isEqual:@"NULL"] || [string isKindOfClass:[NSNull class]] || [string isEqual:[NSNull null]] || [string isEqual:NULL] || [[string class] isSubclassOfClass:[NSNull class]] || string == nil || string == NULL || [string isKindOfClass:[NSNull class]] || [[string stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] length]==0 || [string isEqualToString:@""] || [string isEqualToString:@"(null)"]){
return @"";
}else{
return (NSString *)string;
}
}
2.字典中所有字段自动判空
-(NSDictionary *)checkSrtingWithDictionary:(NSDictionary *)dict{
NSMutableDictionary * tmpDic = [dict mutableCopy];
NSArray * keys = [dict allKeys];
[keys enumerateObjectsUsingBlock:^(id _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
id value = tmpDic[obj];
if ([value isKindOfClass:[NSDictionary class]]) {
[tmpDic setObject:[self checkSrtingWithDictionary:value] forKey:obj];
}else if ([value isKindOfClass:[NSArray class]]){
[tmpDic setObject:[self checkSrtingWithArray:value] forKey:obj];
}else{
[tmpDic setObject:[NSString isNullToString:value] forKey:obj];
}
}];
return tmpDic.copy;
}
3.数组中所有字段自动判空
-(NSArray *)checkSrtingWithArray:(NSArray *)array{
NSMutableArray * tmpArr = [array mutableCopy];
[tmpArr enumerateObjectsUsingBlock:^(id _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
id value = tmpArr[idx];
if ([value isKindOfClass:[NSDictionary class]]) {
[tmpArr replaceObjectAtIndex:idx withObject:[self checkSrtingWithDictionary:value]];
}else if ([value isKindOfClass:[NSArray class]]){
[tmpArr replaceObjectAtIndex:idx withObject:[self checkSrtingWithArray:value]];
}else{
[tmpArr replaceObjectAtIndex:idx withObject:[NSString isNullToString:value]];
}
}];
return tmpArr.copy;
}
