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| #import "MethodSwizzlViewController.h"
#import <objc/message.h>
@interface MethodSwizzlViewController ()
@end
@implementation MethodSwizzlViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)btnClick2:(id)sender {
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"按钮点击事件2" message:@"一般这里做的是的一些跳转操作\n\n想要在这里插入一些统计逻辑" preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction *defaultAction = [UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
}];
[alertController addAction:defaultAction];
[self presentViewController:alertController animated:YES completion:nil];
}
- (IBAction)btnClick:(id)sender {
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"按钮点击事件1" message:@"一般这里做的是的一些跳转操作\n\n想要在这里插入一些统计逻辑" preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction *defaultAction = [UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
}];
[alertController addAction:defaultAction];
[self presentViewController:alertController animated:YES completion:nil];
}
/*
#pragma mark - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
}
*/
#pragma mark - method swizzling
- (void)swizzled_btnClick:(id)sender
{
// call original implementation, because of the method_exchangeImplementations()
[self swizzled_btnClick:sender];
// Logging
NSLog(@"统计按钮1点击事件");
}
void swizzleMethod(Class class, SEL originalSelector, SEL swizzledSelector)
{
// the method might not exist in the class, but in its superclass
Method originalMethod = class_getInstanceMethod(class, originalSelector);
Method swizzledMethod = class_getInstanceMethod(class, swizzledSelector);
// class_addMethod will fail if original method already exists
BOOL didAddMethod = class_addMethod(class, originalSelector, method_getImplementation(swizzledMethod), method_getTypeEncoding(swizzledMethod));
// the method doesn’t exist and we just added one
if (didAddMethod) {
class_replaceMethod(class, swizzledSelector, method_getImplementation(originalMethod), method_getTypeEncoding(originalMethod));
}
else {
method_exchangeImplementations(originalMethod, swizzledMethod);
}
}
void (*old_btnClick2)(id self, SEL _cmd, id sender);
void new_btnClick2(id self, SEL _cmd, id sender);
void new_btnClick2(id self, SEL _cmd, id sender){
old_btnClick2(self, _cmd, sender);
NSLog(@"统计点击事件2");
}
void swizzleMethod2(Class classOrignal,SEL orignalSelector){
Method originalMethod = class_getInstanceMethod(classOrignal, orignalSelector);
old_btnClick2 = (void *)method_getImplementation(originalMethod);
method_setImplementation(originalMethod, (IMP)new_btnClick2);
}
+(void)load{
swizzleMethod([self class], @selector(btnClick:), @selector(swizzled_btnClick:));
swizzleMethod2([self class],@selector(btnClick2:));
}
@end
|