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| #import "ViewController.h"
#import <objc/message.h>
@interface ViewController ()
@end
@implementation ViewController
//1.无参无返回值
- (void)run1 {
NSLog(@"1.无参无返回值");
}
//2.有参无返回值
- (void)run2:(NSArray *)parameters {
NSLog(@"2.有参无返回值 name=%@ age=%d", parameters[0], [parameters[1] intValue]);
}
//3.无参有返回值
- (NSString *)run3 {
return @"无参有返回值";
}
//4.有参有返回值
- (int)run4:(NSString *)name age:(int)age height:(float)height {
NSLog(@"4.有参有返回值 name=%@, age=%d, height=%lf", name, age, height);
return age + height;
}
- (void)viewDidLoad {
[super viewDidLoad];
//第一种方式，需要关闭objc_msgSend严格检查，步骤： Build Settings -> 搜索“objc_msgsend” -> 设置为NO
//1.无参无返回值
objc_msgSend(self, @selector(run1));
//2.有参无返回值
objc_msgSend(self, @selector(run2:), @[ @"asdf", @12 ]);
//3.无参有返回值
id returnVal3 = objc_msgSend(self, @selector(run3));
NSLog(@"3.收到参数: %@", returnVal3);
//4.有参有返回值
int returnVal4 = (int)objc_msgSend(self, @selector(run4:age:height:), @"qwerty", @22, @60.8);
NSLog(@"收到参数 %d", returnVal4);
NSLog(@"-----------------------------------------------------------");
//第二种方式，不需要关闭objc_msgSend严格检查
//1.无参无返回值
((void (*)(id, SEL))objc_msgSend)(self, NSSelectorFromString(@"run1"));
//2.有参无返回值
((void (*)(id, SEL, id))objc_msgSend)(self, NSSelectorFromString(@"run2:"), @[ @"asdf", @12 ]);
//3.无参有返回值
((id (*)(id, SEL))objc_msgSend)(self, NSSelectorFromString(@"run3"));
//4.有参有返回值
((id (*)(id, SEL, id, id, id))objc_msgSend)(self, NSSelectorFromString(@"run4:age:height:"), @"qwerty", @22, @60.8);
}
@end
|
