iOS常用小功能

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iOS中很多小功能都是非常简单的，几行代码就可以实现，比如打电话、发短信、发邮件、应用评分、跳转App Store更新App。

打电话

• 方法1

    NSURL *url = [NSURL URLWithString:@"tel:10086"];
    [[UIApplication sharedApplication] openURL:url];

• 方法2

    //⚠️注意：webview千万不要设置尺寸，不然会挡住其他界面，这里只用来调起打电话，不需要展示。
    _webView = [[UIWebView alloc]initWithFrame:CGRectZero];
    [self.webView loadRequest:[NSURLRequest requestWithURL:            [NSURL URLWithString:@"tel:10086"]]];

发短信

• 方法1
  desc：直接跳转到发短信界面，不能指定短信内容，不能自动返回原应用

    NSURL *url = [NSURL URLWithString:@"sms:10086"];
    [[UIApplication sharedApplication] openURL:url];

• 方法2
  desc：可指定短信内容，能自动回到原应用，使用MessageUI框架

    #import <MessageUI/MessageUI.h>
    @interface ViewController ()<MFMessageComposeViewControllerDelegate>

    MFMessageComposeViewController *vc = [[MFMessageComposeViewController alloc] init];
    //设置短信内容
    vc.body = @"最爱吃兽奶";
    //设置收件人列表
    vc.recipients = @[@"10010",@"10086"];
    //设置代理
    vc.messageComposeDelegate = self;
    //显示控制器
    [self presentViewController:vc animated:YES completion:nil];

#pragma mark - MFMessageComposeViewControllerDelegate
//代理方法，当短信界面关闭的时候调用，发完后会自动回到原应用
- (void)messageComposeViewController:(MFMessageComposeViewController *)controller didFinishWithResult:(MessageComposeResult)result {
    //关闭短信界面
    [controller dismissViewControllerAnimated:YES completion:nil];
    if (result == MessageComposeResultCancelled) {
        NSLog(@"取消发送");
    }else if (result == MessageComposeResultSent) {
        NSLog(@"已经发出");
    }else {
        NSLog(@"发送失败");
    }
}

发邮件

• 方法1
  desc：用自带的邮件客户端，不能自动返回原应用

    NSURL *url = [NSURL URLWithString:@"mailto:123456@qq.com"];
    [[UIApplication sharedApplication] openURL:url];

• 方法2
  desc：和发短信方法2差不多，使用控制器类名叫做：

    #import <MessageUI/MessageUI.h>
    @interface ViewController ()< MFMailComposeViewControllerDelegate >

    MFMailComposeViewController *vc = [[MFMailComposeViewController alloc] init];
    //设置代理
    vc.mailComposeDelegate = self;
    //设置邮件主题
    [vc setSubject:@"123"];
    //设置收件人
    [vc setToRecipients:@[@"1231321@qq.com",@"601477324@qq.com"]];
    //设置邮件内容
    [vc setMessageBody:@"zxczv" isHTML:NO];
    //显示控制器
    [self presentViewController:vc animated:YES completion:nil];

#pragma mark - MFMailComposeViewControllerDelegate
- (void)mailComposeController:(MFMailComposeViewController *)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError *)error {
    //关闭邮件界面
    [controller dismissViewControllerAnimated:YES completion:nil];
    if (result == MFMailComposeResultCancelled) {
        NSLog(@"取消发送");
    }else if (result == MFMailComposeResultSaved) {
        NSLog(@"保存完成");
    }else if (result == MessageComposeResultSent) {
        NSLog(@"已经发出");
    }else {
        NSLog(@"发送失败");
    }
}

应用评分

desc：为了提高应用的用户体验，经常需要邀请用户对应用进行评分，应用评分无非就是跳转App Store展示自己的应用。

    NSString *appid = @"725296055";
    NSString *str = [NSString stringWithFormat:@"itms-apps://itunes.apple.com/cn/app/id%@?mt=8",appid];
    [[UIApplication sharedApplication] openURL:[NSURL URLWithString:str]];

版本更新

    NSString *appid = @"1104867082";
    NSString *str = [NSString stringWithFormat:@"https://itunes.apple.com/cn/app/linkmore/id%@?mt=8",appid];
    [[UIApplication sharedApplication] openURL:[NSURL URLWithString:str]];