引言
本文以pod 'PGDatePicker' ,'2.6.9'·为例子
问题：iOS12系统上日期视图被筛选视图遮挡
思路：利用运行时API修改第三方SDK的内部实现
I、iOS视图置顶方案
让一个View至于最顶端， 避免被其他子视图遮盖住
zPosition : 同级Layer改变显示顺序 bringSubviewToFront: 让指定子视图显示到窗口最前面
https://blog.csdn.net/z929118967/article/details/105298711
CSDN ID：u011018979
昵称：#公号：iOS逆向
II、案例：适配iOS12系统上日期视图被筛选视图遮挡问题
适配iOS12系统上日期视图被筛选视图遮挡问题
背景：为了适配iOS12系统上日期视图被筛选视图遮挡问题
方案：修改第三方库日期视图的层级
修改PGDatePickManager，在viewWillLayoutSubviews将contentView和dismissView添加到keyWindow
由于是第三方SDK，可使用自定义类重写viewWillLayoutSubviews，但是推荐在分类使用方法交换进行实现
2.1 自定义类重写viewWillLayoutSubviews
- (void)viewWillLayoutSubviews { [super viewWillLayoutSubviews]; self.headerView.style = self.style; self.dismissView.frame = self.view.bounds; self.contentView.backgroundColor = self.datePicker.backgroundColor; if (self.style == PGDatePickManagerStyleSheet) { [self setupStyleSheet]; }else if (self.style == PGDatePickManagerStyleAlertTopButton) { [self setupStyleAlert]; }else { [self setupStyle3]; } // [self.view bringSubviewToFront:self.contentView]; [[UIApplication sharedApplication].keyWindow addSubview:_dismissView]; [[UIApplication sharedApplication].keyWindow addSubview:self.contentView]; }
2.2 在分类使用方法交换让日期视图视图置顶
.h
//PGDatePickManager+ios12.h #import "PGDatePickManager.h" NS_ASSUME_NONNULL_BEGIN @interface PGDatePickManager (ios12) @end NS_ASSUME_NONNULL_END
.m
#import "PGDatePickManager+ios12.h" @implementation PGDatePickManager (ios12) + (void)load { static dispatch_once_t onceToken; dispatch_once(&onceToken, ^{ NSArray *selStringsArray = @[@"viewWillLayoutSubviews"]; [selStringsArray enumerateObjectsUsingBlock:^(NSString *selString, NSUInteger idx, BOOL *stop) { NSString *mySelString = [@"sd_" stringByAppendingString:selString]; Method originalMethod = class_getInstanceMethod(self, NSSelectorFromString(selString)); Method myMethod = class_getInstanceMethod(self, NSSelectorFromString(mySelString)); method_exchangeImplementations(originalMethod, myMethod); }]; }); } - (void)sd_viewWillLayoutSubviews{ [self sd_viewWillLayoutSubviews]; [UIApplication.sharedApplication.delegate.window bringSubviewToFront:self.view.superview]; } @end
