iOS UIButton上同时加图片和标题，设置偏移

//微信登录
UIButton *weixinbtn = [UIButton buttonWithType:UIButtonTypeSystem];
weixinbtn.layer.cornerRadius = 5;
weixinbtn.clipsToBounds = YES;
[weixinbtn setTitle:@"微信登录" forState:UIControlStateNormal];
[weixinbtn setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
[weixinbtn setImage:[[UIImage imageNamed:@"weixin"]imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal ] forState:UIControlStateNormal];
[weixinbtn setImageEdgeInsets:UIEdgeInsetsMake(0, 0, 0, 10)];
[weixinbtn setTitleEdgeInsets:UIEdgeInsetsMake(0, 10, 0, 0)];
weixinbtn.backgroundColor = [UIColor colorWithHexString:@"73D7BF"];
[self addSubview:weixinbtn];