UIButton的用處特別多，這裏只記錄下把按鈕應用在圖文顯示的場景，和需要把圖片作爲按鈕的背景圖片顯示場景；
另外記錄下在父控件的子控件優先顯示方法（控件置於最前面和置於最後面）。
先上效果圖：
1、當在某個地方既需要顯示圖片，還需要顯示文字，另外還要有點擊功能的時候，這時按鈕是個很好的選擇。
按鈕中的圖片和文字的距離可以自由調整，圖片的也可以上下左右翻轉。日常項目中像這些場景都是很容易碰到的。
按鈕圖文設置、圖文位置移動、按鈕中圖片翻轉示例代碼：
/** 測試圖文並茂的按鈕，圖文移動 */
- (void)addMoveImgAndTextButton{
//1、創建一個按鈕：30x50
UIButton *iconBtn = [[UIButton alloc] initWithFrame:CGRectMake(10, 100, 150, 80)];
[iconBtn setTitle:@"我的好友" forState:UIControlStateNormal];
[iconBtn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
[iconBtn setImage:[UIImage imageNamed:@"pointer"] forState:UIControlStateNormal];
iconBtn.layer.borderColor = [UIColor redColor].CGColor; //邊框顏色
iconBtn.layer.borderWidth = 1; //邊框寬度
iconBtn.titleLabel.backgroundColor = [UIColor greenColor]; //文字顏色
iconBtn.imageView.backgroundColor = [UIColor blackColor]; //圖片顏色
[iconBtn addTarget:self action:@selector(clickButton:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:iconBtn];
self.iconBtn = iconBtn;
//2、移動iconBtn按鈕圖片和文字
UIButton *btn = [[UIButton alloc] initWithFrame:CGRectMake(170, 100, 120, 45)];
[btn setTitle:@"圖右移字左移" forState:UIControlStateNormal];
btn.titleLabel.numberOfLines = 0;
[btn setBackgroundColor:[UIColor blackColor]];
[btn addTarget:self action:@selector(changeBtnFrame:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:btn];
//3、移動iconBtn按鈕圖片和文字
UIButton *btn2 = [[UIButton alloc] initWithFrame:CGRectMake(170, 150, 120, 45)];
[btn2 setTitle:@"字右移圖左移" forState:UIControlStateNormal];
btn2.titleLabel.numberOfLines = 0;
[btn2 setBackgroundColor:[UIColor blackColor]];
[btn2 addTarget:self action:@selector(changeBtnFrame2:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:btn2];
//分割線
UIView *lineView = [[UIView alloc] initWithFrame:CGRectMake(0, 210, 500, 1)];
lineView.backgroundColor = [UIColor grayColor];
[self.view addSubview:lineView];
}
/** 點擊按鈕使圖片位置翻轉 */
- (void)clickButton:(UIButton *)sender{
sender.imageView.transform = CGAffineTransformRotate(sender.imageView.transform, M_PI);
}
/** 移動圖片和文字位置 */
- (void)changeBtnFrame:(UIButton *)sender{
UIEdgeInsets edge = self.iconBtn.imageEdgeInsets;
CGFloat changeNum = 10;
self.iconBtn.imageEdgeInsets = UIEdgeInsetsMake(0, edge.left + changeNum, 0, -(edge.left + changeNum));
self.iconBtn.titleEdgeInsets = UIEdgeInsetsMake(0, -(edge.left + changeNum), 0, edge.left + changeNum);
NSLog(@"edge.left: %f, edge.right: %f", edge.left, edge.right);
}
/** 反方向移動圖片和文字位置 */
- (void)changeBtnFrame2:(UIButton *)sender{
UIEdgeInsets edge = self.iconBtn.imageEdgeInsets;
CGFloat changeNum = 10;
self.iconBtn.imageEdgeInsets = UIEdgeInsetsMake(0, edge.left - changeNum, 0, -(edge.left - changeNum));
self.iconBtn.titleEdgeInsets = UIEdgeInsetsMake(0, -(edge.left - changeNum), 0, edge.left - changeNum);
NSLog(@"...edge.left: %f, edge.right: %f", edge.left, edge.right);
}2、有時候需要給按鈕設置背景圖片，一般UI給個圖片，然後我們自己對圖片進行處理，讓背景圖片自適應按鈕展示，矩形圓角。
但是有時候，產品要求顯示的按鈕左右必須是圓形的，這時候雖然可以讓ui切個適配的圖片做背景，其實針對如果是背景圖片是純色的話，我們可以利用
控件的layer.masksToBounds， 和layer.cornerRadius屬性來讓按鈕或者其他控件左右兩邊都是圓形的。
下面寫了五個橙色背景的按鈕作比較：背景圖片和按鈕尺寸匹配的、背景圖片和按鈕尺寸或偏大或偏小的、處理背景圖片讓背景圖片自適應按鈕的、不用背景圖片使用圖層來設置按鈕左右圓形的：
/** 測試給按鈕設置背景圖片 */
- (void)addBackgroundImgButton{
//4、96x25 按鈕設置背景圖片，顏色rgb(255,145,0)
UIImage *img = [UIImage imageNamed:@"btn_bg"];
UIButton *clickBtn = [[UIButton alloc] initWithFrame:CGRectMake(10, 240, 96, 25)];
[clickBtn setBackgroundImage:img forState:UIControlStateNormal];
[clickBtn setTitle:@"click Me" forState:UIControlStateNormal];
[self.view addSubview:clickBtn];
//4.2 給按鈕設置背景圖片, 按鈕圖片不適配
UIButton *clickBtn2 = [[UIButton alloc] initWithFrame:CGRectMake(120, 220, 120, 50)];
[clickBtn2 setBackgroundImage:img forState:UIControlStateNormal];
[clickBtn2 setTitle:@"click Me" forState:UIControlStateNormal];
[self.view addSubview:clickBtn2];
//4.3 給按鈕設置背景圖片，按鈕和圖片不適配
UIButton *clickBtn3 = [[UIButton alloc] initWithFrame:CGRectMake(260, 240, 80, 15)];
[clickBtn3 setBackgroundImage:img forState:UIControlStateNormal];
[clickBtn3 setTitle:@"click Me" forState:UIControlStateNormal];
[self.view addSubview:clickBtn3];
//4.4 處理背景圖片，讓背景圖片自適應按鈕
NSLog(@"img.size: %@", NSStringFromCGSize(img.size));
UIImage *newImg = [img stretchableImageWithLeftCapWidth:img.size.width/2 topCapHeight:img.size.height/2];
NSLog(@"newImg.size: %@", NSStringFromCGSize(newImg.size));
UIButton *clickBtn4 = [[UIButton alloc] initWithFrame:CGRectMake(10, 300, 150, 60)];
[clickBtn4 setBackgroundImage:newImg forState:UIControlStateNormal];
[clickBtn4 setTitle:@"click Me" forState:UIControlStateNormal];
[self.view addSubview:clickBtn4];
//4.5 按鈕不使用背景圖片，設置背景顏色當做有背景圖片
UIButton *clickBtn5 = [[UIButton alloc] initWithFrame:CGRectMake(180, 300, 150, 60)];
[clickBtn5 setTitle:@"click Me" forState:UIControlStateNormal];
clickBtn5.layer.masksToBounds = YES;
clickBtn5.layer.cornerRadius = 30;
clickBtn5.backgroundColor = [UIColor colorWithRed:255/255.f green:145/255.f blue:0 alpha:1];
[self.view addSubview:clickBtn5];
//分割線
UIView *lineView = [[UIView alloc] initWithFrame:CGRectMake(0, 380, 500, 1)];
lineView.backgroundColor = [UIColor grayColor];
[self.view addSubview:lineView];
}3、在有些場景下，需要控制控件的優先顯示或者置後顯示，需要用到方法
- (void)bringSubviewToFront:(UIView *)view; // 將子控件view顯示在父控件的所有子控件的最前面
- (void)sendSubviewToBack:(UIView *)view; //將子控件view顯示在父控件的所有子控件的最後面
示例代碼：
/** 測試子控件的優先顯示（置前和置後） */
- (void)testSubControlShowFront{
//1、紅色view
UIView *redView = [[UIView alloc] initWithFrame:CGRectMake(10, 420, 200, 200)];
redView.backgroundColor = [UIColor redColor];
redView.tag = 11;
[self.view addSubview:redView];
//2、黑色view
UIView *blackView = [[UIView alloc] initWithFrame:CGRectMake(30, 400, 200, 200)];
blackView.backgroundColor = [UIColor blackColor];
blackView.tag = 12;
[self.view addSubview:blackView];
//3、紫色view
UIView *purpleView = [[UIView alloc] initWithFrame:CGRectMake(50, 440, 200, 200)];
purpleView.backgroundColor = [UIColor purpleColor];
purpleView.tag = 13;
[self.view addSubview:purpleView];
//添加操作按鈕
UIButton *operatorBtn = [[UIButton alloc] initWithFrame:CGRectMake(280, 400, 100, 30)];
[operatorBtn setTitle:@"紅色置前" forState:UIControlStateNormal];
operatorBtn.tag = 1;
operatorBtn.backgroundColor = [UIColor blackColor];
[operatorBtn addTarget:self action:@selector(changeViewToFrontShow:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:operatorBtn];
UIButton *operatorBtn2 = [[UIButton alloc] initWithFrame:CGRectMake(280, 450, 100, 30)];
[operatorBtn2 setTitle:@"黑色置前" forState:UIControlStateNormal];
operatorBtn2.tag = 2;
operatorBtn2.backgroundColor = [UIColor blackColor];
[operatorBtn2 addTarget:self action:@selector(changeViewToFrontShow:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:operatorBtn2];
UIButton *operatorBtn3 = [[UIButton alloc] initWithFrame:CGRectMake(280, 500, 100, 30)];
[operatorBtn3 setTitle:@"紫色置前" forState:UIControlStateNormal];
operatorBtn3.tag = 3;
operatorBtn3.backgroundColor = [UIColor blackColor];
[operatorBtn3 addTarget:self action:@selector(changeViewToFrontShow:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:operatorBtn3];
UIButton *operatorBtn4 = [[UIButton alloc] initWithFrame:CGRectMake(280, 550, 100, 30)];
[operatorBtn4 setTitle:@"紫色置後" forState:UIControlStateNormal];
operatorBtn4.tag = 4;
operatorBtn4.backgroundColor = [UIColor redColor];
[operatorBtn4 addTarget:self action:@selector(changeViewToFrontShow:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:operatorBtn4];
}
/** 操作按鈕，切換view置前顯示 */
- (void)changeViewToFrontShow:(UIButton *)sender{
if (sender.tag == 1){
//紅色置前
UIView *redView = [self.view viewWithTag:11];
//將子控件redView在父控件view的所有子控件的最前面顯示
[self.view bringSubviewToFront:redView];
}
else if (sender.tag == 2){
//黑色置前
UIView *blackView = [self.view viewWithTag:12]; //獲取黑色子控件
//將子控件blackView在父控件view的所有子控件的最前面顯示
[self.view bringSubviewToFront:blackView];
}
else if (sender.tag == 3){
//紫色置前
UIView *purpleView = [self.view viewWithTag:13]; //獲取紫色子控件
//將子控件purpleView在父控件view的所有子控件的最前面顯示
[self.view bringSubviewToFront:purpleView];
}
else if (sender.tag == 4){
//紫色置後
UIView *purpleView = [self.view viewWithTag:13]; //獲取紫色子控件
//將子控件purpleView在父控件view的所有子控件的最後面顯示
[self.view sendSubviewToBack:purpleView];
}
}------------------------------------------------------------------------------
----- 完整代碼 ------
//
// TestButtonVC.m
// tan_iosTwo
//
// Created by PX_Mac on 16/10/16.
//
//
#import "TestButtonVC.h"
@interface TestButtonVC ()
@property (nonatomic, weak) UIButton *iconBtn; //帶文字和圖片的按鈕
@end
@implementation TestButtonVC
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
[self addMoveImgAndTextButton]; //添加圖文並茂的按鈕，測試按鈕上的圖文移動
[self addBackgroundImgButton]; //添加設置背景圖片的按鈕
[self testSubControlShowFront]; //測試子控件的優先或置後顯示
}
/** 測試圖文並茂的按鈕，圖文移動 */
- (void)addMoveImgAndTextButton{
//1、創建一個按鈕：30x50
UIButton *iconBtn = [[UIButton alloc] initWithFrame:CGRectMake(10, 100, 150, 80)];
[iconBtn setTitle:@"我的好友" forState:UIControlStateNormal];
[iconBtn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
[iconBtn setImage:[UIImage imageNamed:@"pointer"] forState:UIControlStateNormal];
iconBtn.layer.borderColor = [UIColor redColor].CGColor; //邊框顏色
iconBtn.layer.borderWidth = 1; //邊框寬度
iconBtn.titleLabel.backgroundColor = [UIColor greenColor]; //文字顏色
iconBtn.imageView.backgroundColor = [UIColor blackColor]; //圖片顏色
[iconBtn addTarget:self action:@selector(clickButton:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:iconBtn];
self.iconBtn = iconBtn;
//2、移動iconBtn按鈕圖片和文字
UIButton *btn = [[UIButton alloc] initWithFrame:CGRectMake(170, 100, 120, 45)];
[btn setTitle:@"圖右移字左移" forState:UIControlStateNormal];
btn.titleLabel.numberOfLines = 0;
[btn setBackgroundColor:[UIColor blackColor]];
[btn addTarget:self action:@selector(changeBtnFrame:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:btn];
//3、移動iconBtn按鈕圖片和文字
UIButton *btn2 = [[UIButton alloc] initWithFrame:CGRectMake(170, 150, 120, 45)];
[btn2 setTitle:@"字右移圖左移" forState:UIControlStateNormal];
btn2.titleLabel.numberOfLines = 0;
[btn2 setBackgroundColor:[UIColor blackColor]];
[btn2 addTarget:self action:@selector(changeBtnFrame2:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:btn2];
//分割線
UIView *lineView = [[UIView alloc] initWithFrame:CGRectMake(0, 210, 500, 1)];
lineView.backgroundColor = [UIColor grayColor];
[self.view addSubview:lineView];
}
/** 點擊按鈕使圖片位置翻轉 */
- (void)clickButton:(UIButton *)sender{
sender.imageView.transform = CGAffineTransformRotate(sender.imageView.transform, M_PI);
}
/** 移動圖片和文字位置 */
- (void)changeBtnFrame:(UIButton *)sender{
UIEdgeInsets edge = self.iconBtn.imageEdgeInsets;
CGFloat changeNum = 10;
self.iconBtn.imageEdgeInsets = UIEdgeInsetsMake(0, edge.left + changeNum, 0, -(edge.left + changeNum));
self.iconBtn.titleEdgeInsets = UIEdgeInsetsMake(0, -(edge.left + changeNum), 0, edge.left + changeNum);
NSLog(@"edge.left: %f, edge.right: %f", edge.left, edge.right);
}
/** 反方向移動圖片和文字位置 */
- (void)changeBtnFrame2:(UIButton *)sender{
UIEdgeInsets edge = self.iconBtn.imageEdgeInsets;
CGFloat changeNum = 10;
self.iconBtn.imageEdgeInsets = UIEdgeInsetsMake(0, edge.left - changeNum, 0, -(edge.left - changeNum));
self.iconBtn.titleEdgeInsets = UIEdgeInsetsMake(0, -(edge.left - changeNum), 0, edge.left - changeNum);
NSLog(@"...edge.left: %f, edge.right: %f", edge.left, edge.right);
}
/** 測試給按鈕設置背景圖片 */
- (void)addBackgroundImgButton{
//4、96x25 按鈕設置背景圖片，顏色rgb(255,145,0)
UIImage *img = [UIImage imageNamed:@"btn_bg"];
UIButton *clickBtn = [[UIButton alloc] initWithFrame:CGRectMake(10, 240, 96, 25)];
[clickBtn setBackgroundImage:img forState:UIControlStateNormal];
[clickBtn setTitle:@"click Me" forState:UIControlStateNormal];
[self.view addSubview:clickBtn];
//4.2 給按鈕設置背景圖片, 按鈕圖片不適配
UIButton *clickBtn2 = [[UIButton alloc] initWithFrame:CGRectMake(120, 220, 120, 50)];
[clickBtn2 setBackgroundImage:img forState:UIControlStateNormal];
[clickBtn2 setTitle:@"click Me" forState:UIControlStateNormal];
[self.view addSubview:clickBtn2];
//4.3 給按鈕設置背景圖片，按鈕和圖片不適配
UIButton *clickBtn3 = [[UIButton alloc] initWithFrame:CGRectMake(260, 240, 80, 15)];
[clickBtn3 setBackgroundImage:img forState:UIControlStateNormal];
[clickBtn3 setTitle:@"click Me" forState:UIControlStateNormal];
[self.view addSubview:clickBtn3];
//4.4 處理背景圖片，讓背景圖片自適應按鈕
NSLog(@"img.size: %@", NSStringFromCGSize(img.size));
UIImage *newImg = [img stretchableImageWithLeftCapWidth:img.size.width/2 topCapHeight:img.size.height/2];
NSLog(@"newImg.size: %@", NSStringFromCGSize(newImg.size));
UIButton *clickBtn4 = [[UIButton alloc] initWithFrame:CGRectMake(10, 300, 150, 60)];
[clickBtn4 setBackgroundImage:newImg forState:UIControlStateNormal];
[clickBtn4 setTitle:@"click Me" forState:UIControlStateNormal];
[self.view addSubview:clickBtn4];
//4.5 按鈕不使用背景圖片，設置背景顏色當做有背景圖片
UIButton *clickBtn5 = [[UIButton alloc] initWithFrame:CGRectMake(180, 300, 150, 60)];
[clickBtn5 setTitle:@"click Me" forState:UIControlStateNormal];
clickBtn5.layer.masksToBounds = YES;
clickBtn5.layer.cornerRadius = 30;
clickBtn5.backgroundColor = [UIColor colorWithRed:255/255.f green:145/255.f blue:0 alpha:1];
[self.view addSubview:clickBtn5];
//分割線
UIView *lineView = [[UIView alloc] initWithFrame:CGRectMake(0, 380, 500, 1)];
lineView.backgroundColor = [UIColor grayColor];
[self.view addSubview:lineView];
}
/** 測試子控件的優先顯示（置前和置後） */
- (void)testSubControlShowFront{
//1、紅色view
UIView *redView = [[UIView alloc] initWithFrame:CGRectMake(10, 420, 200, 200)];
redView.backgroundColor = [UIColor redColor];
redView.tag = 11;
[self.view addSubview:redView];
//2、黑色view
UIView *blackView = [[UIView alloc] initWithFrame:CGRectMake(30, 400, 200, 200)];
blackView.backgroundColor = [UIColor blackColor];
blackView.tag = 12;
[self.view addSubview:blackView];
//3、紫色view
UIView *purpleView = [[UIView alloc] initWithFrame:CGRectMake(50, 440, 200, 200)];
purpleView.backgroundColor = [UIColor purpleColor];
purpleView.tag = 13;
[self.view addSubview:purpleView];
//添加操作按鈕
UIButton *operatorBtn = [[UIButton alloc] initWithFrame:CGRectMake(280, 400, 100, 30)];
[operatorBtn setTitle:@"紅色置前" forState:UIControlStateNormal];
operatorBtn.tag = 1;
operatorBtn.backgroundColor = [UIColor blackColor];
[operatorBtn addTarget:self action:@selector(changeViewToFrontShow:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:operatorBtn];
UIButton *operatorBtn2 = [[UIButton alloc] initWithFrame:CGRectMake(280, 450, 100, 30)];
[operatorBtn2 setTitle:@"黑色置前" forState:UIControlStateNormal];
operatorBtn2.tag = 2;
operatorBtn2.backgroundColor = [UIColor blackColor];
[operatorBtn2 addTarget:self action:@selector(changeViewToFrontShow:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:operatorBtn2];
UIButton *operatorBtn3 = [[UIButton alloc] initWithFrame:CGRectMake(280, 500, 100, 30)];
[operatorBtn3 setTitle:@"紫色置前" forState:UIControlStateNormal];
operatorBtn3.tag = 3;
operatorBtn3.backgroundColor = [UIColor blackColor];
[operatorBtn3 addTarget:self action:@selector(changeViewToFrontShow:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:operatorBtn3];
UIButton *operatorBtn4 = [[UIButton alloc] initWithFrame:CGRectMake(280, 550, 100, 30)];
[operatorBtn4 setTitle:@"紫色置後" forState:UIControlStateNormal];
operatorBtn4.tag = 4;
operatorBtn4.backgroundColor = [UIColor redColor];
[operatorBtn4 addTarget:self action:@selector(changeViewToFrontShow:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:operatorBtn4];
}
/** 操作按鈕，切換view置前顯示 */
- (void)changeViewToFrontShow:(UIButton *)sender{
if (sender.tag == 1){
//紅色置前
UIView *redView = [self.view viewWithTag:11];
//將子控件redView在父控件view的所有子控件的最前面顯示
[self.view bringSubviewToFront:redView];
}
else if (sender.tag == 2){
//黑色置前
UIView *blackView = [self.view viewWithTag:12]; //獲取黑色子控件
//將子控件blackView在父控件view的所有子控件的最前面顯示
[self.view bringSubviewToFront:blackView];
}
else if (sender.tag == 3){
//紫色置前
UIView *purpleView = [self.view viewWithTag:13]; //獲取紫色子控件
//將子控件purpleView在父控件view的所有子控件的最前面顯示
[self.view bringSubviewToFront:purpleView];
}
else if (sender.tag == 4){
//紫色置後
UIView *purpleView = [self.view viewWithTag:13]; //獲取紫色子控件
//將子控件purpleView在父控件view的所有子控件的最後面顯示
[self.view sendSubviewToBack:purpleView];
}
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
/*
#pragma mark - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
}
*/
@end作者：xmTan 出處：http://www.cnblogs.com/tandaxia/ 歡迎轉載，但要在文章頁面明顯位置給出原文鏈接，否則保留追究法律責任的權利。 歡迎指出博客中的錯誤。以免更多的人被誤導。