textView 圓角

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#import <QuartzCore/QuartzCore.h>[self.content.layer setBackgroundColor:[[UIColor whiteColor] CGColor]];    [self.content.layer setBorderColor:[[UIColor grayColor] CGColor]];    [self.content.layer setBorderWidth:1.0];     [self.content.layer setCornerRadius:8.0];     [self.content.layer setMasksToBounds:YES];    self.content.clipsToBounds = YES;     // 商品標題    imputFeedBackTextView=[[UITextView alloc] initWithFrame:CGRectMake(20, 100, 280, 130)];    imputFeedBackTextView.font = [UIFont systemFontOfSize:15];    imputFeedBackTextView.backgroundColor = [UIColor whiteColor];    [self.view addSubview:imputFeedBackTextView];    imputFeedBackTextView.hidden=NO;    imputFeedBackTextView.delegate = self;        // 添加商品標題placeholder    labelplaceHorder=[[UILabel alloc]initWithFrame:CGRectMake(25, 105,200,20)];    labelplaceHorder.text = @"請添加商品描述";    labelplaceHorder.font = [UIFont systemFontOfSize:15];    labelplaceHorder.textColor=[UIColor colorWithRed:200/256.0 green:200/256.0 blue:200/256.0 alpha:1];    //  labelGoodsDescription.enabled = NO;    // 設定為不可用          [imputFeedBackTextView.layer setBackgroundColor:[[UIColor whiteColor] CGColor]];    [imputFeedBackTextView.layer setBorderColor:[[UIColor colorWithRed:0.85 green:0.85 blue:0.85 alpha:1] CGColor]];    [imputFeedBackTextView.layer setBorderWidth:1.0];    [imputFeedBackTextView.layer setCornerRadius:6.0];    [imputFeedBackTextView.layer setMasksToBounds:YES];    imputFeedBackTextView.clipsToBounds = YES;     [self.view addSubview:labelplaceHorder];    //實現UITextView的代理 -(void)textViewDidChange:(UITextView *)textView{     if (imputFeedBackTextView.text.length == 0) {        labelplaceHorder.text = @"請添加商品描述";    }else{        labelplaceHorder.text = @"";    }}