系统默认的字体是黑色，按钮颜色是蓝色或者红色的，我们怎样自定义字体呢
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uialertcontroller *alertvc = [uialertcontroller alertcontrollerwithtitle:@"提示" message:@"确认退出登录？" preferredstyle:(uialertcontrollerstylealert)];
uialertaction *cancelaction = [uialertaction actionwithtitle:@"取消" style:uialertactionstylecancel handler:^(uialertaction * _nonnull action) {
nslog(@"点击了cancel");
[alertvc dismissviewcontrolleranimated:yes completion:nil];
}];
uialertaction *okaction = [uialertaction actionwithtitle:@"确定" style:uialertactionstyledefault handler:^(uialertaction * _nonnull action) {
nslog(@"点击了ok");
[[nsuserdefaults standarduserdefaults] setobject:nil forkey:kloginuserkey];
[alertvc dismissviewcontrolleranimated:yes completion:nil];
}];
//修改title
nsmutableattributedstring *alertcontrollerstr = [[nsmutableattributedstring alloc] initwithstring:@"提示"];
[alertcontrollerstr addattribute:nsforegroundcolorattributename value:kmaintextcolor range:nsmakerange(0, 2)];
[alertcontrollerstr addattribute:nsfontattributename value:[uifont systemfontofsize:15] range:nsmakerange(0, 2)];
[alertvc setvalue:alertcontrollerstr forkey:@"attributedtitle"];
//修改message
nsmutableattributedstring *alertcontrollermessagestr = [[nsmutableattributedstring alloc] initwithstring:@"确认退出登录？"];
[alertcontrollermessagestr addattribute:nsforegroundcolorattributename value:ksubtextcolor range:nsrangefromstring(@"确认退出登录？")];
[alertcontrollermessagestr addattribute:nsfontattributename value:[uifont systemfontofsize:13] range:nsrangefromstring(@"确认退出登录？")];
[alertvc setvalue:alertcontrollermessagestr forkey:@"attributedmessage"];
//修改按钮字体颜色
[cancelaction setvalue:kgreencolor forkey:@"titletextcolor"];
[okaction setvalue:kgreencolor forkey:@"titletextcolor"];
[alertvc addaction:cancelaction];
[alertvc addaction:okaction];
[self presentviewcontroller:alertvc animated:yes completion:nil];
这里的kgreencolor 等是我自定义的颜色，换成自己的字体颜色即可
以上这篇ios 修改alertviewcontroller弹框的字体颜色及字体的方法就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持移动技术网。
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