[Objective-c 基础 - 2.11] SEL数据类型

 1         // 1.直接调用
 2         [p test2];
 3         // 2.使用@selector
 4         [p performSelector:@selector(test2)];
 5         // 3.使用@selector调用带参数的方法
 6         [p performSelector:@selector(test3:) withObject:@"李四"];
 7        
 8         SEL s = @selector(test3:);
 9         [p performSelector:s withObject:@"李四”];
10         
11         SEL s2 = NSSelectorFromString(@"test3:");
12         [p performSelector:s2 withObject:@"王五"];

1 - (void) test2
2 {
3     NSString *str = NSStringFromSelector(_cmd);
4     NSLog(@"%@", str);
5     NSLog(@"调用了%@", str);
6 }