【黑马程序员】————Foundation框架01常用结构体

NSRange(location length)

NSPoint\CGPoint

NSSize\CGSize

NSRect\CGRect (CGPint CGSize)

1、NSRange(location length)

 1 void range()
 2 {
 3     // @"i love oc"  // love的范围
 4
 5     //NSRange r1 = {2, 4}; // 不用
 6     //NSRange r2 = {.location = 2, .length = 4};// 不用
 7     //NSRange r3 = NSMakeRange(2, 4); // 掌握
 8     NSString *str = @"i love oc";
 9
10     // 查找某个字符串在str中的范围
11     // 如果找不到，length=0，location=NSNotFound==-1
12     NSRange range = [str rangeOfString:@"java"];
13     NSLog(@"loc = %ld, length=%ld", range.location, range.length);
14 }

2、NSPoint\CGPoint

NSSize\CGSize

NSRect\CGRect (CGPint CGSize)

 1 void point()
 2 {
 3     CGPoint p1 = NSMakePoint(10, 10);
 4     NSPoint p2 = CGPointMake(20, 20);// 最常用
 5
 6     NSSize s1 = CGSizeMake(100, 50);
 7     NSSize s2 = NSMakeSize(100, 50);
 8     CGSize s3 = NSMakeSize(200, 60);
 9
10     CGRect r1 = CGRectMake(0, 0, 100, 50);
11
12     CGRect r2 = { {0, 0}, {100, 90}};
13
14     CGRect r3 = {p1, s2};
15
16     // 使用CGPointZero等的前提是添加CoreGraphics框架
17     CGRect r4 = {CGPointZero, CGSizeMake(100, 90)};
18
19
20     // CGSizeZero
21     // CGRectZero
22
23     // 表示原点
24     // CGPointZero == CGPointMake(0, 0)
25
26
27     // 将结构体转为字符串
28     //NSString *str = NSStringFromPoint(p1);
29
30     //NSString *str = NSStringFromSize(s3);
31
32     NSString *str = NSStringFromRect(r1);
33
34     NSLog(@"%@", str);
35
36
37     // NSLog(@"x=%f, y=%f, width=%f, height=%f", r1.origin.x, r1.origin.y, r1.size.width, r1.size.height);
38 }
39
40 //CGRect myRect(CGFloat x, CGFloat y, CGFloat width, CGFloat height)
41 //{
42 //    CGRect rect;
43 //    rect.origin.x = x;
44 //    rect.origin.y = y;
45 //    rect.size.width = width;
46 //    rect.size.height = height;
47 //
48 //    return rect;
49 //}

3、函数

 1 void point()
 2 {
 3    // 使用这些CGPointEqualToPoint、CGRectContainsPoint等函数的前提是添加CoreGraphics框架
 4     //
 5
 6     // NextStep  Foundation
 7
 8
 9     // 比较两个点是否相同（x、y）
10     BOOL b = CGPointEqualToPoint(CGPointMake(10, 10), CGPointMake(10, 10));
11     //CGRectEqualToRect(<#CGRect rect1#>, <#CGRect rect2#>)
12     //CGSizeEqualToSize(<#CGSize size1#>, <#CGSize size2#>)
13
14
15     // x (50, 150) y (40 , 90)
16     BOOL b2 = CGRectContainsPoint(CGRectMake(50, 40, 100, 50), CGPointMake(60, 45));
17
18     NSLog(@"%d", b2);
19
20     return 0;
21 }