UIAlertController* alert = [UIAlertController alertControllerWithTitle:title message:message preferredStyle:UIAlertControllerStyleAlert];
NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
//设置内容的对齐方式
paragraphStyle.alignment = NSTextAlignmentLeft;
//设置内容的行间距
paragraphStyle.lineSpacing=5.0;
NSDictionary * attributes = @{NSFontAttributeName : [UIFont systemFontOfSize:13.0], NSParagraphStyleAttributeName : paragraphStyle};
NSMutableAttributedString *attributedTitle = [[NSMutableAttributedString alloc] initWithString:message];
//设置内容的字体颜色
[attributedTitle addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:NSMakeRange(0, message.length)];
[attributedTitle addAttributes:attributesrange:NSMakeRange(0, message.length)];
[alert setValue:attributedTitle forKey:@"attributedMessage"];
参考以下两个链接:
https://www.jianshu.com/p/51949eec2e9c
https://blog.csdn.net/qq_33608748/article/details/77572442