Objective-C six-value data type (nsvalue)

// Nsvalue can convert the C type to an objective-C object, such as nsange, cgpoint, cgsize, cgrect, cgvector, uiedgeinsets, and uioffset nsange range = nsmakerange (0, 1 ); nsvalue * rangevalue = [nsvalue valuewithrange: range]; // nsvalue converts the nsnsange valuetorange = [rangevalue]; // The Custom struct typedef struct {char * Name; float score;} student; Student studenta = {"Xiao Ming", 85.0}; nsvalue * studentvalue = [nsvalue value: & studenta withobjctype: @ encode (student)]; // nsvalue converts student valuetostudent; [studentvalue getvalue: & valuetostudent];

Objective-C six-value data type (nsvalue)