OC语法--常用结构体

1.NSRange

初始化方法：

(1) NSRange range;

range.location = 3;
range.length = 5；

(2) 

NSRange range = {3, 5};
或NSRange range = {.location = 3, .length = 5};

(3)Foundation 框架提供的快捷函数NSMakeRange

NSRange range = NSMakeRange(7, 3);
打印方法：
NSString *str = NSStringFromRange(range);
NSLog(@”%@”,str);

2.NSPoint

NSPoint p = NSMakePoint(2,6);
p = CGPointMake(2,6);

3.NSSize

NSSize size;
size = NSMakeSize(3, 6);
size = CGSizeMake(6, 8);
NSString *str = NSStringFromSize(size);
    NSLog(@"%@",str);

4.NSRect

NSRect rect;
rect = NSMakeRect(1.0, 2.2, 5, 6);
rect = CGRectMake(2, 3, 6, 8);
NSString *str = NSStringFromRect(rect);
NSLog(@"%@",str);