warning:(報黃⚠️)
1.CGSize sz = [message sizeWithFont:ft constrainedToSize:CGSizeMake(250, 1000)];
</pre><pre code_snippet_id="1586559" snippet_file_name="blog_20160224_3_9723784" name="code" class="plain">2.NSArray*ifs = (__bridgeid)CNCopySupportedInterfaces();
id info = nil;
for (NSString *ifnam in ifs) {
info = (__bridge id)CNCopyCurrentNetworkInfo((__bridge CFStringRef)ifnam);
if (info && [info count]) {
break;
}
}
3.constrainedToSize
CGSize sz = [message sizeWithFont:ft constrainedToSize:CGSizeMake(250, 1000)];
alertView 棄用 (UIAlertController 代替)