首頁猿問在ViewDidLoad...

在ViewDidLoad 里添加UIButton的點擊事件，不能觸發(fā)。

JavaScript

富國滬深 2019-04-07 11:19:27

UIButton*btn2=[[UIButtonalloc]initWithFrame:CGRectMake(0,38,100,38)];[btn2setTitle:@"添加好友"forState:UIControlStateNormal];btn2.titleLabel.font=[UIFontsystemFontOfSize:16];[btn2addTarget:selfaction:@selector(btn2Click:)forControlEvents:UIControlEventTouchDown];之前可以觸發(fā)，現(xiàn)在不知是何原因不能觸發(fā)了？

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2 回答

料青山看我應(yīng)如是

TA貢獻(xiàn)1772條經(jīng)驗獲得超8個贊

改成如下代碼再試試UIButton*btn2=[[UIButtonalloc]initWithFrame:CGRectMake(0,38,100,38)];[btn2setTitle:@"添加好友"forState:UIControlStateNormal];btn2.titleLabel.font=[UIFontsystemFontOfSize:16];[btn2addTarget:selfaction:@selector(btn2Click:)forControlEvents:UIControlEventTouchUpInside];

反對回復(fù) 2019-04-07