UIButton设置textlabel和image位置

//二者位置交换
[tempBtn setImageEdgeInsets:UIEdgeInsetsMake(0, newSize.width, 0, -newSize.width)];
[tempBtn setTitleEdgeInsets:UIEdgeInsetsMake(0, -image.size.width, 0,image.size.width)];

    //（newSize时textlable的size可以用来得如下方法得到）    NSDictionary *attrs = @{NSFontAttributeName : font};return [text boundingRectWithSize:maxSize options:NSStringDrawingUsesLineFragmentOrigin attributes:attrs context:nil].size;