純色圓角按鈕

#define kBtnBackgroundColor [UIColor colorWithRed:73.0/255.0 green:189.0/255.0 blue:204.0/255.0 alpha:1.0]

#define kBtnBackgroundColor1 [UIColor colorWithRed:73.0/255.0 green:200.0/255.0 blue:30.0/255.0 alpha:1.0]

#define kBtnFont    [UIFont fontWithName:@"arial" size:17]

    

    //純色圓角按鈕1

    UIButton *btnLogin = [UIButtonbuttonWithType:UIButtonTypeRoundedRect];

    btnLogin.frame =CGRectMake(30.0,275.0, 260.0,45.0);

    [btnLogin setBackgroundColor:kBtnBackgroundColor];

    btnLogin.layer.cornerRadius =4.0;//關鍵點，設置btn的圓角大小

    btnLogin.titleLabel.font =kBtnFont;

    [UIFontfontWithName:@"arial"size:17];

    [btnLogin setTitle:@"ok"forState:UIControlStateNormal];

    [btnLogin setTintColor:[UIColorwhiteColor]];//關鍵點，設置btn的文字顏色

    [btnLogin addTarget:selfaction:@selector(changePw:)forControlEvents:UIControlEventTouchUpInside];

    [self.viewaddSubview:btnLogin];

    

    //純色圓角按鈕2

    UIButton *btnLogin1 = [UIButtonbuttonWithType:UIButtonTypeRoundedRect];

    btnLogin1.frame =CGRectMake(30.0,200.0, 260.0,45.0);

    [btnLogin1 setBackgroundColor:kBtnBackgroundColor1];

    btnLogin1.layer.cornerRadius =4.0;

    btnLogin1.titleLabel.font =kBtnFont;

    [UIFontfontWithName:@"arial"size:17];

    [btnLogin1 setTitle:@"ok"forState:UIControlStateNormal];

    [btnLogin1 setTintColor:[UIColorwhiteColor]];

    [btnLogin1 addTarget:selfaction:@selector(changePw:)forControlEvents:UIControlEventTouchUpInside];

    [self.viewaddSubview:btnLogin1];

實戰

項目中多個地方用到了自定義的圓角矩形，但是我想用XIB來實現自定義的按鈕的創建

於是重寫UIButton

內容：

- (id)initWithCoder:(NSCoder *)aDecoder

{

    if(self == [super initWithCoder:aDecoder])

    {

        [self initlization];

    }

    return self;

}

- (void)initlization

{

    [self setBackgroundColor:kBtnBackgroundColor];

    self.layer.cornerRadius = 4.0;//關鍵點，設置btn的圓角大小

    [self setTintColor:[UIColor blackColor]];//關鍵點，設置btn的文字顏色

}

在使用時，直接用XIB來拖一個按鈕，

 使用即可，

現在還有一個問題，那個- (id)initWithCoder:(NSCoder *)aDecoder　方法不點明白，是什麼時候纔會用到的呢？