iOS APP拨打电话

1.

NSMutableString* str=[[NSMutableStringalloc]initWithFormat:@"telprompt://%@",@"400****688"];

[[UIApplicationsharedApplication]openURL:[NSURLURLWithString:str]];

2.

NSMutableString* str=[[NSMutableStringalloc]initWithFormat:@"tel:%@",@"400****688"];

UIWebView* callWebview = [[UIWebViewalloc]init];

[callWebviewloadRequest:[NSURLRequestrequestWithURL:[NSURLURLWithString:str]]];

[self.viewaddSubview:callWebview];