设置UIButton的文字居右显示 去掉点击默认置灰效果

1.设置UIButton的文字居右显示

[button setContentHorizontalAlignment:UIControlContentHorizontalAlignmentRight];

2.去掉点击默认置灰效果

[button setAdjustsImageWhenHighlighted:NO];  // default is YES. if YES, image is drawn darker when highlighted(pressed)