根据文件,您只需致电:

[myButton setTitle:@"Play" forState:UIControlStateNormal];

uibutton文档解释了原因:

通常,如果没有为状态指定属性,则默认情况下使用uicontrolStateNormal值。如果未设置uicontrolStateNormal的值,则属性默认为系统值。因此,至少应该设置正常状态的值。

也就是说,如果只设置正常值,其他状态在设置时将引用它。

也可以通过以下方式设置:

[myButton setTitle:@"Play" forState:UIControlStateNormal|UIControlStateHighlighted|UIControlStateSelected];

二千零一十九

只是

yourButton.setTitle("Click me", for: .normal)

可以为ui按钮创建类别:

@implementation UIButton (Addition)
-(void)setTitleForAllStates:(NSString *)title {
     //you can add/remove this area : UIControlStateApplication, UIControlStateDisabled, UIControlStateReserved
     [self setTitle:title forState:UIControlStateNormal];
     [self setTitle:title forState:UIControlStateSelected];
     [self setTitle:title forState:UIControlStateHighlighted];
}
@end