UIWebView load url with UTF8 char

剛剛遇到的，如果有跟API query的參數有UTF8 char的話也是一樣解法：

	NSString* urlStr = @"https://maps.google.com.tw/maps?q=加油站";
	NSURL *url = [NSURL URLWithString:[urlStr stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
	NSURLRequest *request = [NSURLRequest requestWithURL:url];
	[self.gasWebView loadRequest:request];

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