ios 打电话

/** 根据参数打电话 */
- (void)callPhoneWithString:(NSString *)phoneNumStr
{
    NSURL * url = nil;
   
    NSString * encode = [phoneNumStr encodedURLParameterString];
   
    url = [NSURL URLWithString:[NSString stringWithFormat:@"tel://%@",encode]];
   
    static UIWebView *webView = nil;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        webView = [UIWebView new];
    });
    [webView loadRequest:[NSURLRequest requestWithURL:url]];
}