iOS 开发－碎文 11.28

实现某个View的点击事件：

//单击的 Recognizer

    UITapGestureRecognizer * singleRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(SingleTap:)];

    singleRecognizer.numberOfTapsRequired = 1;    //tap次数

    [self.itemView addGestureRecognizer:singleRecognizer];

然后再实现方法：

#pragma mark singleRecognizerDelegateMethod

- (void)SingleTap:(UITapGestureRecognizer *)recognizer

{

    if (!self.urlField.text.length == 0) {

        //处理单击操作

        self.itemView.hidden = YES;

    }

    //取消textField响应

    [self.urlField resignFirstResponder];

}

代理实现：

在头文件中声明代理

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController <UIWebViewDelegate,UITextFieldDelegate>

在Controller中

- (void)viewDidLoad {

    [super viewDidLoad];

    self.urlField.delegate = self;

    self.webView.delegate = self;

然后实现代理方法。

取消textField 的焦点：

[self.urlField resignFirstResponder];

webView加载页面：

//获得field的text并请求该URL

        NSString * urla = self.urlField.text;

        NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:urla]];

        //webview加载请求

        [self.webView loadRequest:request];

弹出窗口：

NSString *title = [NSString stringWithFormat:@"AAA"];

    NSString  *message = [NSString stringWithFormat:@"消息"];

    [[[UIAlertView alloc]initWithTitle:title message:message delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:nil, nil]show];