iOS development nsstring conversion to int and float and string concatenation

One, nsstring and int and float of the mutual conversion

NSString *tempa = @ "123";

NSString *TEMPB = @ "456";

1. String concatenationNSString *newstring = [NSString stringwithformat:@ "%@%@", TEMPA,TEMPB];

　2. Character Representable int
　　int intstring = [newstring intvalue];

3.int to character
　　NSString *stringint = [NSString stringwithformat:@ "%d", intstring];

4. Character representable float　float floatstring = [newstring floatvalue];5.float Turn character

　　NSString *stringfloat = [NSString stringwithformat:@ "%f", intstring];

Second, string splicing

NSString *string;//result string nsstring* string1, string2;//existing string, string1 and string2 need to be connected//method One: string = [NSString in Itwithformat :@ "%@,%@" , string1, string2 ];Method Two: string = [string1 stringbyappendingstring:string2]; Method Three: String = [string stringByAppendingFormat:@ "%@,%@" ,string1, string2];

 

iOS development nsstring conversion to int and float and string concatenation