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button.contentHorizontalAlignment = UIControlContentHorizontalAlignmentLeft;button.titleEdgeInsets = UIEdgeInsetsMake(0, 10, 0, 0);
button.contentHorizontalAlignment = UIControlContentHorizontalAlignmentLeft;
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原文地址：http://www.cnblogs.com/wskgjmhh/p/4617468.html
