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@interface
NSUInteger textFontSize;
- (IBAction)changeTextFontSize:(id)sender
{
switch ([sender tag]) {
case 1: // A-
textFontSize = (textFontSize > 50) ? textFontSize -5 : textFontSize;
break;
case 2: // A+
textFontSize = (textFontSize < 160) ? textFontSize +5 : textFontSize;
break;
}
NSString *jsString = [[NSString alloc]
initWithFormat:@"document.getElementsByTagName(‘body‘)[0].style.webkitTextSizeAdjust=
‘%d%%‘",
textFontSize];
[web stringByEvaluatingJavaScriptFromString:jsString];
}
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原文地址:http://www.cnblogs.com/huangzs/p/4479894.html