iOS拨打电话的3种实现方式

NSMutableString * string = [[NSMutableString alloc] initWithFormat:@"tel:%@",@"136****0000"];
UIWebView * callWebview = [[UIWebView alloc] init];
[callWebview loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:string]]];
[self.view addSubview:callWebview];

let callWebview = UIWebView()callWebview.loadRequest(NSURLRequest(url: URL(string: "tel:136****0000")!) as URLRequest)
self.view.addSubview(callWebview)

NSMutableString * string = [[NSMutableString alloc] initWithFormat:@"telprompt:%@",@"136****0000"];
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:string]];

NSMutableString * string = [[NSMutableString alloc] initWithFormat:@"tel:%@",@"136****0000"];
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:string]];