实例化alertcontroller之后,可以遍历view的子视图,子视图title和message嵌套了多层父视图,(需要遍历6层subViews),
下面是取title和message的父视图的代码:
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;
swift版:
let alert =UIAlertController(title:"版本升级", message: message,preferredStyle: .Alert)
let subView = alert.view.subviews[0].subviews[0].subviews[0].subviews[0].subviews[0]
let msgLabel = subView.subviews[1]as?UILabel
msgLabel?.textAlignment= .Left
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