How to create a string (OC)

String class: NSString The length of the object created and cannot be changed

Create string (first) (most commonly used)

NSString *string1 = @ "iphone";

Create a string (the second type)

NSString *string2 = [[NSString alloc]initwithstring: string1];

NSLog (@ "%@", string2);

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The third kind is not used

NSString *string3 = [NSString string]; Create an empty string with the convenience constructor method

NSLog (@ "%@", string3);

The fourth kind is not used

NSString *string4 = [NSString stringwithstring: string1];

NSLog (@ "%@", String4);

Fifth type

[[NSString alloc]initwithstring:<# (NSString *) #>]

NSString *string5 = [[NSString alloc]initwithformat: @ "%@%@", string1,

STRING2]; Can pass multiple parameters, this must be remembered.

NSLog (@ "%@", string5);

The sixth type (most commonly used

NSString *string6 = [NSString stringwithformat:@ "%@%@", string1,string2];

NSLog (@ "%@", String6);

How to create a string (OC)