IOS 拨打电话

NSString *tel = [@"4000100000" stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]] ;//去掉电话两端的空格

NSString *telUrl = [NSString stringWithFormat:@"tel://%@",@"400010000"];

UIWebView *web = [[UIWebView alloc] initWithFrame:CGRectZero];

[web loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:telUrl]]];