IOS 一键拨打电话功能

NSMutableString * str=[[NSMutableString alloc] initWithFormat:@"tel:%@",@"186xxxx6979"];

UIWebView * callWebview = [[UIWebView alloc] init];

[callWebview loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:str]]];

[self.view addSubview:callWebview];