如何检查ios sdk中的数组是空还是空？

Question

I want to check if my Bond is empty or null and NULL value.

{
Bonds =(
      {
        DOB = "12/09/1988";
        about = "";
      }
      );
User =     {
    city = CA;
    email = "karmhadadmtl@gmail.com";
};
success = True;
}

Second time this type get data how to check Bond key

{
Bonds = Null;
User =     {
    city = CA;
    email = "developer.i12@gmail.com";
};
success = True;
}

Answer 1

You just check for nil

if(data[@"Bonds"]==nil){
  NSLog(@"it is nil");
}

or

if ([data[@"Bonds"] isKindOfClass:[NSNull class]]) {
    NSLog(@"it is null");
}

Answer 2

if ([data[@"Bonds"] isKindOfClass:[NSNull class]] || data[@"Bonds"] == nil || [data[@"Bonds"] isEqualToString:@""]) {

}

Answer 3

[NSNull null] always returns a same object so this should work fine.

if (dictionary[@"Bonds"] != [NSNull null]) {
    // requried data is present, now check if it is nil or empty.
}

Answer 4

check: if (![dataArray isKindOfClass:[NSNull class]]) &&

check if it having elements [dataArray firstObject] - to check array having one or more elements.

Answer 5

The best possible way should be:

if (!data[@"Bonds"] || ![data[@"Bonds"] count]){
    NSLog(@"Data Found");
}else{
    NSLog(@"Data Not Found");
}