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 在.h文件中线声明show()方法

- (void)show;

.m文件中添加全屏遮罩，在遮罩上添加了一个选择框并添加了底部弹出的动画，可自行在其中添加tableview、pickerview等其他视图，并添加了点击选择框视图外区域隐藏

#import "MaskView.h"@interface MaskView()@property (nonatomic ,strong) UIView *deliverView; //底部View
@property (nonatomic ,strong) UIView *BGView; //遮罩@end@implementation MaskView- (instancetype)initWithFrame:(CGRect)frame {if ([super initWithFrame:frame]) {}return self;
}- (void)appearClick {// ------全屏遮罩self.BGView = [[UIView alloc] init];self.BGView.frame = [[UIScreen mainScreen] bounds];self.BGView.tag = 100;self.BGView.backgroundColor = [HexColor(@"#000000") colorWithAlphaComponent:0.0];self.BGView.opaque = NO;//--UIWindow的优先级最高，Window包含了所有视图，在这之上添加视图，可以保证添加在最上面UIWindow *appWindow = [[UIApplication sharedApplication] keyWindow];[appWindow addSubview:self.BGView];// ------给全屏遮罩添加的点击事件UITapGestureRecognizer *gesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(exitClick)];gesture.numberOfTapsRequired = 1;gesture.cancelsTouchesInView = NO;[self.BGView addGestureRecognizer:gesture];[UIView animateWithDuration:0.3 animations:^{self.BGView.backgroundColor = [HexColor(@"#000000") colorWithAlphaComponent:0.24];}];// ------底部弹出的Viewself.deliverView = [[UIView alloc] init];
//    self.deliverView.frame = CGRectMake(0, SCREEN_WIDTH, SCREEN_WIDTH, 306);ViewRadius(self.deliverView, 16);self.deliverView.backgroundColor = myCellColor;[appWindow addSubview:self.deliverView];[self.deliverView mas_makeConstraints:^(MASConstraintMaker *make) {make.bottom.mas_equalTo(0);make.width.mas_equalTo(kWidth);make.height.mas_equalTo(306);}];// ------View出现动画self.deliverView.transform = CGAffineTransformMakeTranslation(0.01, SCREEN_HEIGHT);[UIView animateWithDuration:0.5 animations:^{self.deliverView.transform = CGAffineTransformMakeTranslation(0.01, 0.01);}];[self.deliverView addSubview:self.tableView];[self.tableView mas_makeConstraints:^(MASConstraintMaker *make) {make.top.mas_equalTo(18);make.left.mas_equalTo(0);make.width.mas_equalTo(kWidth);make.height.mas_equalTo(48 * 5);}];}
/*** 功能： View退出*/
- (void)exitClick {NSLog(@"====");[UIView animateWithDuration:0.5 animations:^{self.deliverView.transform = CGAffineTransformMakeTranslation(0.01, SCREEN_HEIGHT);self.deliverView.alpha = 0.2;self.BGView.alpha = 0;} completion:^(BOOL finished) {[self.BGView removeFromSuperview];[self.deliverView removeFromSuperview];}];
}@end