多个uibutton 只选中其中一个

一、（推荐）

定义一个UIButton *currenctButton; 

- (IBAction)ButtonAction:(UIButton *)sender 
{ 
if (sender != currentButton) 
{ 
currentButton.selected = NO; 
currentButton = sender; 
} 
currentButton.selected = YES; 

}

二、

先定义个全局的UIButton* _tmpBtn ,让它指向nil 
所有button 指向同一个点击事件； 
-(void)buttonSeclected:(UIButton *)btn withTag:(NSInteger)tag{ 
if (_tmpBtn == nil){ 
btn.selected = YES; 
_tmpBtn = btn; 
} 
else if (_tmpBtn !=nil && _tmpBtn == btn){ 
btn.selected = YES; 

} 
else if (_tmpBtn!= btn && _tmpBtn!=nil){ 
_tmpBtn.selected = NO; 
btn.selected = YES; 
_tmpBtn = btn; 
} 
}