我已经为您的特定要求编写了一个解决方案。
首先，我按照您的描述实现了您的代码，并观察到您报告的相同问题 - 当您点击任何东西（包括 UIButton）时，虚假点击事件被发送到点击处理程序。
这告诉我 UITapGestureRecogniser 正在“窃取”本应转到 UIButton 的触摸，因此我决定最简单、最实用的解决方案是利用该功能来发挥我的优势，因此我为 pickerview 和按钮也。我们刚刚丢弃的pickerview的点击，我们解析并传递给按钮的点击处理程序的其他点击。
注意 - 为方便起见，我在 xib 中分配了pickerview 的数据源和委托。你也需要这样做，或者在代码中设置它。
标题
//
// ViewController.h
// stackExchangeDemo
//
// Created by unsynchronized on 18/01/12.
// released to public domain via http://stackoverflow.com/a/8908028/830899
//
#import <UIKit/UIKit.h>
@interface ViewController : UIViewController
<UIPickerViewDelegate, UIPickerViewDataSource>
{
UIButton *btn1;
UIPickerView *picker1;
}
@property (retain, nonatomic) IBOutlet UIButton *btn1;
@property (retain, nonatomic) IBOutlet UIPickerView *picker1;
@end
执行
//
// ViewController.m
// stackExchangeDemo
//
// Created by unsynchronized on 18/01/12.
// released to public domain via http://stackoverflow.com/a/8908028/830899
//
#import "ViewController.h"
@implementation ViewController
@synthesize btn1;
@synthesize picker1;
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Release any cached data, images, etc that aren't in use.
}
#pragma mark - View lifecycle
-(void) handleSingleTap:(UITapGestureRecognizer *) tapper {
if (tapper.state == UIGestureRecognizerStateEnded) {
NSLog(@"%@",NSStringFromSelector(_cmd));
}
}
- (IBAction)handleButtonTap:(id)sender {
NSLog(@"%@",NSStringFromSelector(_cmd));
}
-(void) handleButtonTapGesture:(UITapGestureRecognizer *) tapper {
// call the buttons event handler
UIControlEvents eventsToHandle = UIControlEventTouchUpInside;
if (tapper.state == UIGestureRecognizerStateEnded) {
UIButton *btn = (UIButton *) tapper.view;
for (NSString *selName in [btn actionsForTarget:self forControlEvent:eventsToHandle]) {
SEL action = NSSelectorFromString(selName);
if (action) {
[self performSelector:action withObject:btn1];
break;
}
};
}
}
-(void) handleDummyTap:(UITapGestureRecognizer *) tapper {
// silently ignore the tap event for this view.
}
-(void) setupTap:(UIView *) view action:(SEL)action {
// assign custom tap event handler for given view.
UITapGestureRecognizer *gestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:action];
[view addGestureRecognizer:gestureRecognizer];
[gestureRecognizer release];
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
[self setupTap:self.view action:@selector(handleSingleTap:)];
[self setupTap:picker1 action:@selector(handleDummyTap:)];
[self setupTap:btn1 action:@selector(handleButtonTapGesture:)];
}
- (void)viewDidUnload
{
[self setBtn1:nil];
[self setPicker1:nil];
[super viewDidUnload];
// Release any retained subviews of the main view.
// e.g. self.myOutlet = nil;
}
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
}
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
}
- (void)viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
}
- (void)viewDidDisappear:(BOOL)animated
{
[super viewDidDisappear:animated];
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
// Return YES for supported orientations
return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}
#pragma mark @protocol UIPickerViewDataSource<NSObject>
// returns the number of 'columns' to display.
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView{
return 1;
}
// returns the # of rows in each component..
- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component {
return 1;
}
#pragma mark @protocol UIPickerViewDelegate<NSObject>
- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component {
return [@"so long and thanks for all the fish".copy autorelease ];
}
- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component{
NSLog(@"%@",NSStringFromSelector(_cmd));
}
- (void)dealloc {
[btn1 release];
[picker1 release];
[super dealloc];
}
@end