作品鏈接：
http://www.itdecent.cn/users/1e0f5e6f73f6/top_articles

1.代碼

- (IBAction)callPhone {
    [self openURL:@"tel://10086"];
}

- (IBAction)sendMessage {
    [self openURL:@"sms://10086"];
}

- (IBAction)jumpToSettings {
    [self openURL:@"prefs:root=LOCATION_SERVICES"];
}

- (void)openURL:(NSString *)urlString
{
    // 1.獲取打電話的URL
    NSURL *url = [NSURL URLWithString:urlString];
    
    // 2.判斷這個URL是否可以打開
    if ([[UIApplication sharedApplication] canOpenURL:url]) {
        [[UIApplication sharedApplication] openURL:url];
    }
}

2.系統(tǒng)界面的url圖片

Snip20160826_1.png