OC语法--常用结构体

1.NSRange

初始化方法：

(1) NSRange range;

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1. range.location = 3;
2. range.length = 5；

(2) 

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

(3) Foundation 框架提供的快捷函数NSMakeRange

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

2.NSPoint

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

3.NSSize

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

4.NSRect

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