UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];//button的類型?

button.frame = CGRectMake(100, 100,90, 90);//button的frame?

button.backgroundColor = [UIColor cyanColor];//button的背景顏色?

?

// [button setBackgroundImage:[UIImage imageNamed:@"man_64.png"] forState:UIControlStateNormal];?

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// 在UIButton中有三個(gè)對(duì)EdgeInsets的設(shè)置：ContentEdgeInsets、titleEdgeInsets、imageEdgeInsets?

[button setImage:[UIImage imageNamed:@"IconHome@2x.png"] forState:UIControlStateNormal];//給button添加image?

button.imageEdgeInsets = UIEdgeInsetsMake(5,13,21,button.titleLabel.bounds.size.width);//設(shè)置image在button上的位置（上top，左left，下bottom，右right）這里可以寫負(fù)值，對(duì)上寫－5，那么image就象上移動(dòng)5個(gè)像素?

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[button setTitle:@"首頁(yè)" forState:UIControlStateNormal];//設(shè)置button的title?

button.titleLabel.font = [UIFont systemFontOfSize:16];//title字體大小?

button.titleLabel.textAlignment = NSTextAlignmentCenter;//設(shè)置title的字體居中?

[button setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];//設(shè)置title在一般情況下為白色字體?

[button setTitleColor:[UIColor grayColor] forState:UIControlStateHighlighted];//設(shè)置title在button被選中情況下為灰色字體?

button.titleEdgeInsets = UIEdgeInsetsMake(71, -button.titleLabel.bounds.size.width-50, 0, 0);//設(shè)置title在button上的位置（上top，左left，下bottom，右right）?

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// [button setContentEdgeInsets:UIEdgeInsetsMake(70, 0, 0, 0)];//?

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// button.contentHorizontalAlignment = UIControlContentHorizontalAlignmentCenter;//設(shè)置button的內(nèi)容橫向居中。。設(shè)置content是title和image一起變化?

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[button addTarget:self action:@selector(tap) forControlEvents:UIControlEventTouchUpInside];?