//創(chuàng)建自定義按鈕

UIButton*btn_click = [UIButtonbuttonWithType:UIButtonTypeCustom];

//創(chuàng)建普通狀態(tài)按鈕圖片

[btn_clicksetImage:[UIImageimageNamed:@"home"]forState:UIControlStateNormal];

//創(chuàng)建高亮或選中狀態(tài)按鈕圖片

[btn_clicksetImage[UIImageimageNamed:@"homeselected"]forState:UIControlStateHighlighted]

//設(shè)置按鈕普通狀態(tài)標(biāo)題

[btn_clicksetTitle:@"我的主帖"forState:UIControlStateNormal];

//設(shè)置按鈕字體

btn_click.titleLabel.font= [UIFontsystemFontOfSize:14];

//設(shè)置按鈕普通狀態(tài)標(biāo)題顏色

[btn_clicksetTitleColor:[UIColorredColor]forState:UIControlStateNormal];

//設(shè)置按鈕高亮或選中狀態(tài)標(biāo)題顏色

[btn_clicksetTitleColor:[UIColoryellowColor]forState:UIControlStateHighlighted];

//設(shè)置按鈕背顏色

[btn_clicksetBackgroundColor:[UIColorgrayColor]];

//按鈕按下后的模糊狀態(tài)

[btn_clicksetAdjustsImageWhenHighlighted:NO];

//按鈕點(diǎn)擊事件

[btn_clickaddTarget:selfaction:@selector(clickAction:)forControlEvents:UIControlEventTouchUpInside];

//按鈕坐標(biāo)和尺寸

btn_click.frame=CGRectMake(0,200,APP_WIGHT/2,49);

//按鈕圖片和標(biāo)題總高度

CGFloattotalHeight =(btn_click.imageView.frame.size.height+btn_click.titleLabel.frame.size.height);

//設(shè)置按鈕圖片偏移

[btn_clicksetImageEdgeInsets:UIEdgeInsetsMake((totalHeightbtn_click.imageView.frame.size.height),0.0,0.0, -btn_click.titleLabel.frame.size.width)];

//設(shè)置按鈕標(biāo)題偏移

[btn_clicksetTitleEdgeInsets:UIEdgeInsetsMake(0.0, btn_click.imageView.frame.size.width, -(totalHeight - btn_click.titleLabel.frame.size.height),0.0)];

//加載按鈕到視圖

[self.viewaddSubview:btn_click];

關(guān)于UIButton，既可以采用setBackgroundImage 來設(shè)置底部圖片，同時(shí)也可以采用??setImage方法；兩者還是有一定區(qū)別的；

首先setBackgroundImage，image會(huì)隨著button的大小而改變，圖片自動(dòng)會(huì)拉伸來適應(yīng)button的大小，這個(gè)時(shí)候仍然可以設(shè)置button的title，title默認(rèn)在button中間，image不會(huì)擋住title；

相反的的setImage，圖片不會(huì)進(jìn)行拉伸，原比例的顯示在button上，此時(shí)再設(shè)置title，title默認(rèn)顯示在圖右邊，因此可以根據(jù)需求選中方法；