我正在尝试新的iOS 7 API,以下代码需要花费一分钟才能执行！ NSLog(@"start encoding");NSString *htmlBody = @"htmlbodyI am bbold/b and iitalic/i";NSStringEncoding encoding = NSUnicodeStringEncoding;NSData *data = [htmlBody
NSLog(@"start encoding");
NSString *htmlBody = @"<html><body>I am <b>bold</b> and <i>italic</i>";
NSStringEncoding encoding = NSUnicodeStringEncoding;
NSData *data = [htmlBody dataUsingEncoding:encoding];
NSDictionary *options = @{NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType,
NSCharacterEncodingDocumentAttribute: @(encoding)};
NSAttributedString *body = [[NSAttributedString alloc] initWithData:data
options:options
documentAttributes:nil
error:nil];
NSLog(@"end encoding%@", body);
到底是怎么回事？
在做了一些调查之后,我意识到我把这个方法称为webview的公园.finishLoading回调.我相信这会导致某些实时锁定或等待WebKit的线程.解决方案是让webview方法从dispatch_aync块中调用其委托(或其他代码)：- (void)webViewDidFinishLoad:(UIWebView *)webView
{
if (self.successBlock) {
dispatch_async(dispatch_get_main_queue(), ^{
//this success block eventually calls my NSAttributedString code above
self.successBlock();
});
}
}