//1.创建一个NSRange结构体 表示范围        NSRange range = {4,5};        NSRange range2 = NSMakeRange(4, 5);        NSString * strRange = NSStringFromRange(range);        NSLog(@"strRange %@",strRange);                //2.NSSize 等同于 CGSize 有两个值组成 weight表示宽度 height高度        NSSize  size = {21,19};        NSSize  size2 = NSMakeSize(21, 19);        NSString *strSize =  NSStringFromSize(size2);        NSLog(@"strSize %@",strSize);                //3.NSPoint 等同CGPoint 表示一个点的坐标位置        NSPoint point = {20,40};        NSPoint point2 = NSMakePoint(20, 40);        NSString * strPoint = NSStringFromPoint(point);        NSLog(@"strPoint %@",strPoint);                //4.NSRect        NSRect rect = {40,60,100,200};        NSRect rect2 = NSMakeRect(0, 10, 100, 100);        NSString * strRect = NSStringFromRect(rect);        NSLog(@"strRect %@",strRect);