Question

我试图提出一个速率应用程序警报，但它没有正确打开，事实上，当我点击是按钮时，它根本打开网址，我如何让它工作？

以下是viewdidload中的调用： viewdidload中的以下代码也在app delegate

中

[super viewDidLoad];
//rate app
NSUserDefaults *prefsr = [NSUserDefaults standardUserDefaults];
NSInteger launchCount = [prefsr integerForKey:@"launchCount"];
if (launchCount >= 1) {
    UIAlertView *alertRate = [[UIAlertView alloc] initWithTitle:@"Like this app?" message:@"Rate on the app store." delegate:nil cancelButtonTitle:@"No, thanks" otherButtonTitles:@"Yes",@"Remind me later", nil];
    [alertRate show];
}


-(void)alertViewRate:(UIAlertView *)alertViewRate clickedButtonAtIndex:(NSInteger)buttonIndexP{
if (buttonIndexP == 2) {
    [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"https://www.google.com"]];


}
else if (buttonIndexP == 1){
    [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"https://www.google.com"]];
}

Answer 1

创建UIAlertView时添加委托Self

 UIAlertView *alertRate = [[UIAlertView alloc] initWithTitle:@"Like this app?" message:@"Rate on the app store." delegate:self cancelButtonTitle:@"No, thanks" otherButtonTitles:@"Yes",@"Remind me later", nil];
[alertRate show];

UIAlertView的委托方法也需要被打包

-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{

if (buttonIndex == 2) {
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"https://www.google.com"]];
}
else if (buttonIndex == 1){
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"https://www.google.com"]];
}
}

Answer 2

在创建UIAlertView对象时，您尚未将委托设置为self。所以 - （void）alertView：（UIAlertView *）alertView clickedButtonAtIndex：（NSInteger）当你点击AlertView中的按钮时，没有调用buttonIndex方法。

更改您的代码

UIAlertView *alertRate = [[UIAlertView alloc] initWithTitle:@"Like this app?" message:@"Rate on the app store." delegate:nil cancelButtonTitle:@"No, thanks" otherButtonTitles:@"Yes",@"Remind me later", nil];

要

UIAlertView *alertRate = [[UIAlertView alloc] initWithTitle:@"Like this app?" message:@"Rate on the app store." delegate:self. cancelButtonTitle:@"No, thanks" otherButtonTitles:@"Yes",@"Remind me later", nil];

如何在xcode中正确使用NSURL来评价我的应用？

2 个答案: