53 lines
1.7 KiB
Objective-C
53 lines
1.7 KiB
Objective-C
#ifdef SHOULD_COMPILE_LOOKIN_SERVER
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//
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// LKS_GestureTargetActionsSearcher.m
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// LookinServer
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//
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// Created by likai.123 on 2023/9/11.
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//
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#import "LKS_GestureTargetActionsSearcher.h"
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#import <objc/runtime.h>
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#import "NSArray+Lookin.h"
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#import "LookinTuple.h"
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#import "LookinWeakContainer.h"
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@implementation LKS_GestureTargetActionsSearcher
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+ (NSArray<LookinTwoTuple *> *)getTargetActionsFromRecognizer:(UIGestureRecognizer *)recognizer {
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if (!recognizer) {
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return @[];
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}
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// KVC 要放到 try catch 里面防止 Crash
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@try {
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NSArray* targetsList = [recognizer valueForKey:@"_targets"];
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if (!targetsList || targetsList.count == 0) {
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return @[];
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}
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// 数组元素对象是 UIGestureRecognizerTarget*
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// 这个元素有两个属性，一个是名为 _target 的属性指向某个实例，另一个是名为 _action 的属性保存一个 SEL
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NSArray<LookinTwoTuple *>* ret = [targetsList lookin_map:^id(NSUInteger idx, id targetBox) {
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id targetObj = [targetBox valueForKey:@"_target"];
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if (!targetObj) {
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return nil;
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}
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SEL action = ((SEL (*)(id, Ivar))object_getIvar)(targetBox, class_getInstanceVariable([targetBox class], "_action"));
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LookinTwoTuple* tuple = [LookinTwoTuple new];
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tuple.first = [LookinWeakContainer containerWithObject:targetObj];
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tuple.second = (action == NULL ? @"NULL" : NSStringFromSelector(action));
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return tuple;
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}];
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return ret;
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}
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@catch (NSException * e) {
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NSLog(@"LookinServer - %@", e);
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return @[];
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}
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}
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@end
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#endif /* SHOULD_COMPILE_LOOKIN_SERVER */
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