iOS开发App中调用Safari和发起电话呼叫

调用Safari浏览器：

NSURL* url = [[NSURL alloc] initWithString:@”http://www.cnblogs.com/luzhan/”];
[[ UIApplication sharedApplication]openURL:url];

打电话：

NSURL* url = [[NSURL alloc] initWithString:@”tel:110″];
[[ UIApplication sharedApplication]openURL:url];