Demo地址先上
NSString *msg = @"1.如果你有女朋友\n2.请她吃东西?--你拉倒吧,吃胖了怎么办.\n3.恩.我想跟你谈恋爱?恩,你喜欢我,不关我事.\n4.追啊追...我的骄傲放纵";
系统的
Snip20170720_1.png
然而,我想要居左订格的,比如用到版本更新提示的时候
UIAlertView
遍历subviews 即可获取msg对应的label,设置msglabel 居左属性即可
省事啊,可是没有margin ,效果贴边怎么办
NSInteger count = 0;
for( UIView * view in alert.subviews )
{
if( [view isKindOfClass:[UILabel class]] )
{
count ++;
if ( count == 2 ) { //仅对message左对齐
UILabel* label = (UILabel*) view;
// label.frame = CGRectMake(20, -20,200, size.height- 10);
label.textAlignment =NSTextAlignmentLeft;
}
}
}
UIAlertController
UIAlertController获取msg所属的label,有一点点麻烦...不过总有父视图,sub...sub...sub 总会找到的
UIView *subView1 = alertController.view.subviews[0];
UIView *subView2 = subView1.subviews[0];
UIView *subView3 = subView2.subviews[0];
UIView *subView4 = subView3.subviews[0];
NSLog(@"subvie4 - %@",subView4.subviews);
UIView *subView5 = subView4.subviews[0];
NSLog(@"subvie5 - %@",subView5.subviews);
来,看下控制台输出的
subvie4 - (
">"
)
subvie5 - (
">",
">",
">",
">"
)
没错,多了两个label,找到这俩坑货了,别问我怎么区分谁是title ,谁是message的,没错---我试出来的.后面就可以随意居左,居中,居右了
UILabel *lab_title = subView5.subviews[0];
UILabel *lab_message = subView5.subviews[1];
UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:nil];
[alertController addAction:cancelAction];
lab_message.textAlignment = NSTextAlignmentLeft;
lab_title.textAlignment = NSTextAlignmentCenter;
[vc presentViewController:alertController animated:YES completion:nil];
Snip20170720_2.png
这样是不是好一些啦?不好?哦~
什么?你想要彩色的标题?什么?你想要大号的message?可以啊,后面随意啦~
//可富文本展示 -
NSMutableAttributedString *alertControllerStr = [[NSMutableAttributedString alloc] initWithString:title];
[alertControllerStr addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:NSMakeRange(0, 2)];
[alertControllerStr addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:20] range:NSMakeRange(3, 2)];
[alertController setValue:alertControllerStr forKey:@"attributedTitle"];
// 修改message
NSMutableAttributedString *alertControllerMessageStr = [[NSMutableAttributedString alloc] initWithString:message];
[alertControllerMessageStr addAttribute:NSForegroundColorAttributeName value:[UIColor greenColor] range:NSMakeRange(0, 2)];
[alertControllerMessageStr addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:NSMakeRange(3, 4)];
[alertControllerMessageStr addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:20] range:NSMakeRange(5, 3)];
[alertController setValue:alertControllerMessageStr forKey:@"attributedMessage"];
// 修改按钮的颜色
[cancelAction setValue:[UIColor cyanColor] forKey:@"titleTextColor"];
Snip20170720_3.png
不过这个样式有些固定,需要自己做range ,设置属性,烦的死!那就自定义吧,加载html富文本样式,后台返回,移动端直接加载,那就来吧.
搜了些自定义的alert ,发现挺喜欢customiOSAlert这个的,高度自定义很方便(html 富文本,计算高度先,想要滚动的就加scrollow,想跟系统更接近,就把动画去掉,按钮弄弄,多个按钮分割线,稍微改一下).下面是我项目中一些场景
NSString *htmlSr = @"你好
这是一个例子，请显示
外加一个table
aaaa bbbb cccc
";
CustomIOSAlertView *alertView = [[CustomIOSAlertView alloc] init];
[alertView setContainerView:[self createView:htmlSr title:@"来"]];
[alertView setButtonTitles:@[@"确定",@"取消"]];
// [alertView setDelegate:self];
[alertView setOnButtonTouchUpInside:^(CustomIOSAlertView *alertView, int buttonIndex) {
NSLog(@"sett -ldd- %d",buttonIndex);
[alertView close];
}];
[alertView setUseMotionEffects:true];
[alertView show];
Snip20170720_4.png
猿友们,拿去撸~