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  • 验证码UIButton状态UIButtonTypeSystem时候一闪闪UIButtonTypeCustom不闪

    修改UIButton状态,注释NSLog(@"text1%@",_btn.titleLabel.text);这段结果很不可思议

    _btn.titleLabel.text = [NSString stringWithFormat:@"aaaaaa%i",i];

    NSLog(@"text1%@",_btn.titleLabel.text);

    NSLog(@"text3%@",[_btn titleForState:UIControlStateNormal]);

     

    UIButtonTypeSystem

    2015-05-21 11:16:10.363 test[6137:504267] text1aaaaaa4

    2015-05-21 11:16:10.363 test[6137:504267] text3Button111

    2015-05-21 11:16:13.368 test[6137:504267] text1aaaaaa5

    2015-05-21 11:16:13.368 test[6137:504267] text3Button111

    UIButtonTypeCustom

    2015-05-21 11:17:48.471 test[6260:520944] text1Button111

    2015-05-21 11:17:48.472 test[6260:520944] text3Button111

    2015-05-21 11:17:51.475 test[6260:520944] text1Button111

    2015-05-21 11:17:51.476 test[6260:520944] text3Button111

     

    UIButtonTypeSystem下面就不闪了,断点情况下会出现原始值

    [[_btn class] setAnimationsEnabled:NO];

    _btn.titleLabel.text = [NSString stringWithFormat:@"aaaaaa%i",i];

    [[_btn class] setAnimationsEnabled:YES];

     

    个人小结论:在引用titleLabel.text的时候 其实会对本身进行一次赋值,默认本身状态下所对应的title值

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  • 原文地址:https://www.cnblogs.com/Leetvin/p/4519904.html
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