OBJECTIVE-C Learning (Foundation framework)--01 structural bodies

Nsrange (location length)

"I Love OC"
Nsrange r = Nsmakerange (2,4)

NSString *str = @ "I love You";

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

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

Cannot find length = 0,location = Nsnotfound = =-1 (sign bit involved)

Nspoint\cgpoint Cross-platform

Cgpoint p = nsmakepoint (10, 10);
Nspoint p = cgpointmake (20, 20);

Cgsize s = nsmakesize (20, 20);
Nssize s = cgsizemake (100,100);

Nsrect\cgrect (Cgpoint cgsize)
CGRect r = CGRectMake (0, 0, 2, 3);

Origin.x
Origin.y
Sieze.width
Sieze.height

NSLog ("%@", [Nsstringfromesize (s)]);
Nsstringfromerect (R)

Cgpointzero = = Cgpointmake (0, 0)
CGRect r1 = {Cgpointzero, cgsizemake (100, 100)};

BOOL B = Cgpointequaltopoint (Cgpointmake (Ten), Cgpointmake (10, 20));
Cgrectequaltorect

BOOL B = Cgrectcontainspoint (CGRectMake (80, 80), Cgpointmake (+);
CG = Coregraphics Frame

NS = NextStep's Foundation

OBJECTIVE-C Learning (Foundation framework)--01 structural bodies