button 文字在左，图片在右

UIButton * hidenamebtn= [UIButton buttonWithType:UIButtonTypeCustom];
hidenamebtn.frame=CGRectMake(12, kScreen_Height/2-40, 80, 35);
hidenamebtn.backgroundColor=[UIColor clearColor];

// [hidenamebtn setTitleEdgeInsets:UIEdgeInsetsMake(0, 35, 0, 0)];
[hidenamebtn setImage:[UIImage imageNamed:@"evaStar"] forState:UIControlStateNormal];
[hidenamebtn setTitle:@"匿名" forState:UIControlStateNormal];
hidenamebtn.contentHorizontalAlignment=UIControlContentHorizontalAlignmentFill;
[hidenamebtn setTitleEdgeInsets:UIEdgeInsetsMake(0, 30, 0, 0)];
[hidenamebtn setImageEdgeInsets:UIEdgeInsetsMake(0, 0, 0, 50)];
[hidenamebtn setTitleColor:[UIColor redColor] forState:UIControlStateNormal];
[hidenamebtn addTarget:self action:@selector(hide) forControlEvents:UIControlEventTouchUpInside];
[backview addSubview:hidenamebtn];
这里图片的大小要控制好 要小的