Objective-C specifications for formatting

Objective-C specifications for formatting

Objective-C format strings and C # are very different. Let's take a look at them.

InC #We can do this in a few simple examples:

1 // format the output string 2 string word = "world"; 3 string test = string. format ("hello {0}", word); 4 5 // Format the output number 6 int num = 100; 7 string myNum = string. format ("myNum = {0}", num); 8 9 // Format the output time 10 DateTime nowTime = DateTime. now; 11 string currentDate = string. format ("nowTime = {0}", nowTime );

InObjective-CWe need to perform the conversion in this way:

1 // format the string 2 NSString * world = @ "world"; 3 NSLog (@ "hello % @", world ); 4 5 // format an integer 6 int num = 2; 7 NSLog (@ "% d", num );

% @	Object
% D, % I	Integer
% U, % z	Unoperator integer
% F	Floating Point/double-Character
% X, % X	Hexadecimal integer
% O	Octal integer
% Zu	Size_t
% P	Pointer
% E	Floating Point/double-character (Scientific Computing)
% G	Floating Point/double-Character
% S	C string
%. * S	Pascal string
% C	Character
% C	Unichar
% Lld	64-bit long integer (long)
% Llu	64-bit long integer
% Lf	64-bit dual-Character
% Hhd	Boolean Type