IOS开发 UIAlertController 内容label 左对齐

UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"版本更新" message:descript preferredStyle:UIAlertControllerStyleAlert];

UIView *subView1 = alert.view.subviews[0];

UIView *subView2 = subView1.subviews[0];

UIView *subView3 = subView2.subviews[0];

UIView *subView4 = subView3.subviews[0];

UIView *subView5 = subView4.subviews[0];

//取title和message：

//UILabel *title = subView5.subviews[0];

UILabel *message = subView5.subviews[1];

//然后设置message内容居左：

message.textAlignment = NSTextAlignmentLeft;

[message setValue:[UIColor redColor] forKey:@"textColor"];