First taste of iOS development 1

Today made a simple computer, first to get the text content, and then converted to integer, in the Add, and finally convert the result to a string, and then assign to Label.text, as follows

-(Ibaction) Jisuan: (ID) Sender {

The first two lines of code take out the contents of the Input text field.
NSString *text1 = _num1.text;
NSString *text2 = _num2.text;

The following two lines of code convert a character to an integer type
Nsinteger NUM1 = [Text1 integervalue];
Nsinteger num2 = [Text2 IntegerValue];

Add two numbers
Nsinteger result = Num1 + num2;

Convert the result to a character type by stringWithFormat
NSString *result1 =[nsstring stringwithformat:@ "%d", result];

Assigns the result to the label. Text is displayed.
_result.text = RESULT1;

The purpose of this line code is to hide the keyboard
[Self.view Endediting:yes];
}