iOS Three Ways to Dial Phone Code

1. In this way, if you can't return to the original application after dialing, you will stay in the address book, and you will dial directly without popping up a prompt

NSMutableString * str=[[NSMutableString alloc] initWithFormat:@"tel:%@",@"186xxxxxxxx"];
// NSLog(@"str======%@",str);
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:str]];

2. In this way, after calling, you will return to the original program and pop up a prompt. 1. Use this

NSMutableString * str=[[NSMutableString alloc] initWithFormat:@"tel:%@",@"186xxxxxxxx"];
UIWebView * callWebview = [[UIWebView alloc] init];
[callWebview loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:str]]];
[self.view addSubview:callWebview];

3. In this way, you will also go back to the original program (pay attention to telprompt here) and pop up a prompt

NSMutableString * str=[[NSMutableString alloc] initWithFormat:@"telprompt://%@",@"186xxxxxxxx"];
// NSLog(@"str======%@",str);
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:str]]