OC--Structural body

Nspoint\cgpoint (Common) nssize\cgsize (common) nsrect\cgrect (common) Nsrange

Nspoint P1 = Nsmakepoint (10, 10);

Cgpoint P2 = cgpointmake (10, 20); Common

nssize S1 = nsmakesize (50, 50);

Cgsize s2 = cgsizemake (50, 100); Common

Cgpointzero = = Cgpointmake (0, 0); Cgpointzero indicates the origin (corresponding: Cgsizezero Cgrectzero)

How CGRect is created

CGRect r1 = CGRectMake (10, 10, 50, 50);

CGRect r2 = {{0, 0}, {100, 100}};

CGRectMake R3 = {p1, s1};

The premise of using Cgpointzero is to add the Coregraphics framework

CGRect R4 = {Cgpointzero, Cgsizemake (80, 90)};

convert struct to String

NSString *str1 = Nsstringfrompoint (p1);

NSString *str2 = nsstringfromsize (S1);

NSString *STR3 = nsstringfromrect (r1);

Nsrange

Nsrange r1 = Nsmakerange (3, 5);

NSString *STR4 = @ "as God name";

Find the range of a string in str

If not found, length = 0, location = = Nsnotfound = =-1

Nsrange range = [str rangeofstring:@ "God"];

NSLog (@ "location =%ld, length =%ld", range.location, Range.length);

OC--Structural body