NSDictionary - Need to check whether dictionary contains key-value pair or not

Question

I just need to ask something as follow  Suppose I am having a dictionary   NSMutableDictionary  xyz   NSMutableDictionary alloc  init    xyz setValue   sagar  forKey   s     xyz setValue   amit  forKey   a     xyz setValue   nirav  forKey   n     xyz setValue   abhishek  forKey   a     xyz setValue   xrox  forKey   x      Now  I need to check as follows   xyz does contains key  b  value    pair or not   Question is How    The other question is How to just count total key-value pair   Say for example NSInteger mCount  xyz keyCounts

User · Answer

With literal syntax you can check as follows  static const NSString  kKeyToCheck     yourKey  if  xyz kKeyToCheck     NSLog   Key      has Value       kKeyToCheck  xyz kKeyToCheck    else  NSLog   Key pair do not exits for key       kKeyToCheck

User · Answer

Just ask it for the objectForKey   b    If it returns nil  no object is set at that key   if   xyz objectForKey   b          NSLog   There s an object set for key    b         else       NSLog   No object set for key    b          Edit  As to your edited second question  it s simply NSUInteger mCount    xyz count     Both of these answers are documented well and easily found in the NSDictionary class reference   1   2

[ios] NSDictionary - Need to check whether dictionary contains key-value pair or not

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