ZPositionTest.m

#import "RCViewController.h"
@import QuartzCore;

@implementation RCViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
 
    CGRect rect;
    rect = CGRectMake(50, 50, 200, 200);
    UIView *view0 = [[UIView alloc] initWithFrame:rect];
    view0.backgroundColor = [UIColor redColor];
    view0.tag = 0;
    [self.view addSubview:view0];
    
    rect.origin.x = 100;
    rect.origin.y = 100;
    UIView *view1 = [[UIView alloc] initWithFrame:rect];
    view1.backgroundColor = [UIColor blueColor];
    view1.tag = 1;
    [self.view addSubview:view1];
 
    double delayInSeconds = 1.0;
    dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(delayInSeconds * NSEC_PER_SEC));
    dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
        //view0を見かけ上、前に出す
        view0.layer.zPosition = 1;
    });
    
    UITapGestureRecognizer *recognizer;
    recognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(_tapAction:)];
    [view0 addGestureRecognizer:recognizer];
    
    recognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(_tapAction:)];
    [view1 addGestureRecognizer:recognizer];
}

- (void)_tapAction:(UITapGestureRecognizer*)recognizer
{
    if (recognizer.view.tag == 0) {
        NSLog(@"赤でしょ！");
    } else if (recognizer.view.tag == 1) {
        NSLog(@"青でしょ！");
    } else {
        NSLog(@"今でしょ！");
    }
}

@end