仅在顶部带有圆角的 UITextField

我几个小时以来一直在胡闹，我已经阅读了 Apple 的文档十几次，但我仍然无法找出为什么我的代码不起作用:- (id) init{//初始化元素UITextField *txt_password = [[UITextField alloc] init];UIView *txt_password_paddingVc = [[UIView alloc] initWithFrame:CGRectMake(0,0,10,35)];//配置txt字段[txt_password setSecureTextEntry:YES];[txt_password setDelegate:self];[txt_password setTag:100];[txt_password setPlaceholder:t(@"App Password")];[txt_password setLeftView:txt_password_paddingVc];[txt_password setRightView:txt_password_paddingVc];[txt_password setBackgroundColor:[UIColor whiteColor]];[txt_password setLeftViewMode:UITextFieldViewModeAlways];[txt_password setRightViewMode:UITextFieldViewModeAlways];[txt_password setTranslatesAutoresizingMaskIntoConstraints:NO];[txt_password setAutocapitalizationType:UITextAutocapitalizationTypeNone];[txt_password setAutocorrectionType:UITextAutocorrectionTypeNo];[txt_password.layer setBorderColor:[UIColor colorWithRed:228/255.0 green:228/255.0 blue:228/255.0 alpha:1].CGColor];[txt_password.layer setBorderWidth:1.0f];[txt_password.layer setShadowOpacity:0.0];[txt_password.layer setMasksToBounds:YES];//为 txtfield 制作圆角CAShapeLayer *passwordMaskLayer = [[CAShapeLayer alloc] init];UIBezierPath *passwordMaskPathWithRadiusTop = [UIBezierPath bezierPathWithRoundedRect:txt_password.bounds byRoundingCorners:(UIRectCornerTopLeft | UIRectCornerTopRight)cornerRadii:CGSizeMake(5.0, 5.0)];passwordMaskLayer.frame = txt_password.bounds;passwordMaskLayer.path = passwordMaskPathWithRadiusTop.CGPath;passwordMaskLayer.fillColor = [UIColor whiteColor].CGColor;[txt_password.layer.mask setMask:passwordMaskLayer];//添加txtfield查看[self.view addSubview:txt_password];回归自我；} 解决方案 行:[txt_password.layer.mask setMask:passwordMaskLayer];应该是:[txt_password.layer setMask:passwordMaskLayer];I want to implement an UITextField which has rounded corners only at top left and top right corner.I know about the setter method setCornerRadius: which is a default option of UITextField, but this option only allows me to make all four corners of the txtfield round, but i only want the corners on the top to be round.I'm now messing around since hours, I have read through Appple's docs a dozen of times, but I'm still unable to find out why my code wont work:- (id) init{ // init elements UITextField *txt_password = [[UITextField alloc] init]; UIView *txt_password_paddingVc = [[UIView alloc] initWithFrame:CGRectMake(0,0,10,35)]; // configure txtfield [txt_password setSecureTextEntry:YES]; [txt_password setDelegate:self]; [txt_password setTag:100]; [txt_password setPlaceholder:t(@"App Password")]; [txt_password setLeftView:txt_password_paddingVc]; [txt_password setRightView:txt_password_paddingVc]; [txt_password setBackgroundColor:[UIColor whiteColor]]; [txt_password setLeftViewMode:UITextFieldViewModeAlways]; [txt_password setRightViewMode:UITextFieldViewModeAlways]; [txt_password setTranslatesAutoresizingMaskIntoConstraints:NO]; [txt_password setAutocapitalizationType:UITextAutocapitalizationTypeNone]; [txt_password setAutocorrectionType:UITextAutocorrectionTypeNo]; [txt_password.layer setBorderColor:[UIColor colorWithRed:228/255.0 green:228/255.0 blue:228/255.0 alpha:1].CGColor]; [txt_password.layer setBorderWidth:1.0f]; [txt_password.layer setShadowOpacity:0.0]; [txt_password.layer setMasksToBounds:YES]; // make round corners for txtfield CAShapeLayer *passwordMaskLayer = [[CAShapeLayer alloc] init]; UIBezierPath *passwordMaskPathWithRadiusTop = [UIBezierPath bezierPathWithRoundedRect:txt_password.bounds byRoundingCorners:(UIRectCornerTopLeft | UIRectCornerTopRight) cornerRadii:CGSizeMake(5.0, 5.0)]; passwordMaskLayer.frame = txt_password.bounds; passwordMaskLayer.path = passwordMaskPathWithRadiusTop.CGPath; passwordMaskLayer.fillColor = [UIColor whiteColor].CGColor; [txt_password.layer.mask setMask:passwordMaskLayer]; // add txtfield to view [self.view addSubview:txt_password];return self;} 解决方案 The line:[txt_password.layer.mask setMask:passwordMaskLayer];Should be:[txt_password.layer setMask:passwordMaskLayer]; 这篇关于仅在顶部带有圆角的 UITextField的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！ 上岸，阿里云！