iOS中 按鈕和標題完美各種排列/完美教程
前言:最近常常用到按鈕和相應標題的組合,當按鈕設定圖片加標題時,觸發範圍較小,不易觸發,最重要的是還要調試位移量,相信研究過的開發人員都很頭疼這一點,那我我就想解決,於是在網上研究了一番,個人總結封裝了一個,覺得很棒,推薦給大家!
下面看教程:
整體是對UIButton的自訂封裝:
//UIButton+UIButtonSetEdgeInsets.h#import @interface UIButton (CenterImageAndTitle)//上下置中,圖片在上,文字在下- (void)verticalCenterImageAndTitle:(CGFloat)spacing;- (void)verticalCenterImageAndTitle; //預設6.0//左右置中,文字在左,圖片在右- (void)horizontalCenterTitleAndImage:(CGFloat)spacing;- (void)horizontalCenterTitleAndImage; //預設6.0//左右置中,圖片在左,文字在右- (void)horizontalCenterImageAndTitle:(CGFloat)spacing;- (void)horizontalCenterImageAndTitle; //預設6.0//文字置中,圖片在左邊- (void)horizontalCenterTitleAndImageLeft:(CGFloat)spacing;- (void)horizontalCenterTitleAndImageLeft; //預設6.0//文字置中,圖片在右邊- (void)horizontalCenterTitleAndImageRight:(CGFloat)spacing;- (void)horizontalCenterTitleAndImageRight; //預設6.0@end
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//#import "UIButton+CenterImageAndTitle.m"#import "UIButton+CenterImageAndTitle.h"@implementation UIButton (CenterImageAndTitle)- (void)verticalCenterImageAndTitle:(CGFloat)spacing{ // get the size of the elements here for readability CGSize imageSize = self.imageView.frame.size; CGSize titleSize = self.titleLabel.frame.size; // lower the text and push it left to center it self.titleEdgeInsets = UIEdgeInsetsMake(0.0, - imageSize.width, - (imageSize.height + spacing/2), 0.0); // the text width might have changed (in case it was shortened before due to // lack of space and isn't anymore now), so we get the frame size again titleSize = self.titleLabel.frame.size; // raise the image and push it right to center it self.imageEdgeInsets = UIEdgeInsetsMake(- (titleSize.height + spacing/2), 0.0, 0.0, - titleSize.width);}- (void)verticalCenterImageAndTitle{ const int DEFAULT_SPACING = 6.0f; [self verticalCenterImageAndTitle:DEFAULT_SPACING];}- (void)horizontalCenterTitleAndImage:(CGFloat)spacing{ // get the size of the elements here for readability CGSize imageSize = self.imageView.frame.size; CGSize titleSize = self.titleLabel.frame.size; // lower the text and push it left to center it self.titleEdgeInsets = UIEdgeInsetsMake(0.0, - imageSize.width, 0.0, imageSize.width + spacing/2); // the text width might have changed (in case it was shortened before due to // lack of space and isn't anymore now), so we get the frame size again titleSize = self.titleLabel.frame.size; // raise the image and push it right to center it self.imageEdgeInsets = UIEdgeInsetsMake(0.0, titleSize.width + spacing/2, 0.0, - titleSize.width);}- (void)horizontalCenterTitleAndImage{ const int DEFAULT_SPACING = 6.0f; [self horizontalCenterTitleAndImage:DEFAULT_SPACING];}- (void)horizontalCenterImageAndTitle:(CGFloat)spacing;{ // get the size of the elements here for readability // CGSize imageSize = self.imageView.frame.size; // CGSize titleSize = self.titleLabel.frame.size; self.titleEdgeInsets = UIEdgeInsetsMake(0.0, 0.0, 0.0, - spacing/2); self.imageEdgeInsets = UIEdgeInsetsMake(0.0, - spacing/2, 0.0, 0.0);}- (void)horizontalCenterImageAndTitle;{ const int DEFAULT_SPACING = 6.0f; [self horizontalCenterImageAndTitle:DEFAULT_SPACING];}- (void)horizontalCenterTitleAndImageLeft:(CGFloat)spacing{ // get the size of the elements here for readability // CGSize imageSize = self.imageView.frame.size; // CGSize titleSize = self.titleLabel.frame.size; self.imageEdgeInsets = UIEdgeInsetsMake(0.0, - spacing, 0.0, 0.0);}- (void)horizontalCenterTitleAndImageLeft{ const int DEFAULT_SPACING = 6.0f; [self horizontalCenterTitleAndImageLeft:DEFAULT_SPACING];}- (void)horizontalCenterTitleAndImageRight:(CGFloat)spacing{ // get the size of the elements here for readability CGSize imageSize = self.imageView.frame.size; CGSize titleSize = self.titleLabel.frame.size; // lower the text and push it left to center it self.titleEdgeInsets = UIEdgeInsetsMake(0.0, - imageSize.width, 0.0, 0.0); // the text width might have changed (in case it was shortened before due to // lack of space and isn't anymore now), so we get the frame size again titleSize = self.titleLabel.frame.size; // raise the image and push it right to center it self.imageEdgeInsets = UIEdgeInsetsMake(0.0, titleSize.width + imageSize.width + spacing, 0.0, - titleSize.width);}- (void)horizontalCenterTitleAndImageRight{ const int DEFAULT_SPACING = 6.0f; [self horizontalCenterTitleAndImageRight:DEFAULT_SPACING];}@end
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使用方法非常簡單:
//在使用的地方引入#import "UIButton+CenterImageAndTitle.h"#define kScreenHeight [[UIScreen mainScreen] bounds].size.height //螢幕高度#define kScreenWidth [[UIScreen mainScreen] bounds].size.width //螢幕寬度
為了展現所有效果,簡單展示一下:
for (int i = 0; i< 6; i++) { UIButton *button1 = [UIButton buttonWithType:UIButtonTypeCustom]; button1.frame = CGRectMake(60, 80+i*60, kScreenWidth-60*2, 45); button1.tag = i; button1.backgroundColor = [UIColor greenColor]; button1.titleLabel.font = [UIFont systemFontOfSize:15]; [button1 setTitleColor:[UIColor blackColor] forState:UIControlStateNormal]; [button1 setImage:[UIImage imageNamed:@"good"] forState:UIControlStateNormal]; [button1 setTitle:@"小韓哥的部落格更新了" forState:UIControlStateNormal]; [button1 addTarget:self action:@selector(testAction:) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:button1]; switch (i) { case 0: { //系統預設圖片在左,文字在右,間隔為0 } break; case 1: { //上下置中,圖片在上,文字在下 [button1 verticalCenterImageAndTitle:10.0f]; } break; case 2: { //左右置中,文字在左,圖片在右 [button1 horizontalCenterTitleAndImage:50.0f]; } break; case 3: { //左右置中,圖片在左,文字在右 [button1 horizontalCenterImageAndTitle:50.0f]; } break; case 4: { //文字置中,圖片在左邊 [button1 horizontalCenterTitleAndImageLeft:50.0f]; } break; case 5: { //文字置中,圖片在右邊 [button1 horizontalCenterTitleAndImageRight:50.0f]; } break; default: break; } }
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最後是點擊事件了:
- (void)testAction:(UIButton *)sender{ NSLog(@"testAction:%ld", (long)sender.tag);}
最終效果:
如有問題可通過微博互動聯絡我哦!
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Demo:https://github.com/XiaoHanGe/UIButtonCenterTitleAndImage