str1 = [str1 stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSURL *url = [NSURL URLWithString:[Tool returnFormatString:str1]];
+(NSString *)returnFormatString:(NSString *)str
NSLog(@"URL==%@",url);
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原文:http://blog.csdn.net/u011404663/article/details/48055185