UIScrollView *toScrollView我要添加一個(gè)（它是屏幕的寬度）的灰色底邊框（與iPhone的本地Messages應(yīng)用程序的compose視圖的to-field的邊框完全一樣）。為此，我遵循了可可觸摸：如何更改UIView的邊框顏色和厚度？并使用自定義設(shè)置覆蓋了頂部邊框，UINavigationBar并將其toScrollViewx坐標(biāo)-1和寬度322設(shè)置為使左右邊框剛好不在屏幕上?？雌饋聿诲e(cuò)，但這有點(diǎn)不合時(shí)宜，我想知道是否有更好的方法可以做到這一點(diǎn)。- (void)viewDidLoad { [super viewDidLoad]; // Add UINavigationBar *navigationBar at top. self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCancel target:self action:@selector(cancelAction)]; UINavigationBar *navigationBar = [[UINavigationBar alloc] initWithFrame:CGRectMake(0.0f, 0.0f, 320.0f, 44.0f)]; navigationBar.items = [NSArray arrayWithObject:self.navigationItem]; // Add UIScrollView *toScrollView below navigationBar. UIScrollView *toScrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(-1.0f, 43.0f, 322.0f, 45.0f)]; toScrollView.backgroundColor = [UIColor whiteColor]; toScrollView.layer.borderColor = [UIColor colorWithWhite:0.8f alpha:1.0f].CGColor; toScrollView.layer.borderWidth = 1.0f; [self.view addSubview:toScrollView]; [self.view addSubview:navigationBar]; // covers top of toScrollView}
3 回答
慕森卡
TA貢獻(xiàn)1806條經(jīng)驗(yàn) 獲得超8個(gè)贊
代替UIView@ImreKelényi建議使用，可以使用CALayer：
// Add a bottomBorder.
CALayer *bottomBorder = [CALayer layer];
bottomBorder.frame = CGRectMake(0.0f, 43.0f, toScrollView.frame.size.width, 1.0f);
bottomBorder.backgroundColor = [UIColor colorWithWhite:0.8f
alpha:1.0f].CGColor;
[toScrollView.layer addSublayer:bottomBorder];
忽然笑
TA貢獻(xiàn)1806條經(jīng)驗(yàn) 獲得超5個(gè)贊
這是更通用的Swift擴(kuò)展，可為任何子UIView類創(chuàng)建邊框：
import UIKit
extension UIView {
func addTopBorderWithColor(color: UIColor, width: CGFloat) {
let border = CALayer()
border.backgroundColor = color.CGColor
border.frame = CGRectMake(0, 0, self.frame.size.width, width)
self.layer.addSublayer(border)
}
func addRightBorderWithColor(color: UIColor, width: CGFloat) {
let border = CALayer()
border.backgroundColor = color.CGColor
border.frame = CGRectMake(self.frame.size.width - width, 0, width, self.frame.size.height)
self.layer.addSublayer(border)
}
func addBottomBorderWithColor(color: UIColor, width: CGFloat) {
let border = CALayer()
border.backgroundColor = color.CGColor
border.frame = CGRectMake(0, self.frame.size.height - width, self.frame.size.width, width)
self.layer.addSublayer(border)
}
func addLeftBorderWithColor(color: UIColor, width: CGFloat) {
let border = CALayer()
border.backgroundColor = color.CGColor
border.frame = CGRectMake(0, 0, width, self.frame.size.height)
self.layer.addSublayer(border)
}
}
迅捷3
extension UIView {
func addTopBorderWithColor(color: UIColor, width: CGFloat) {
let border = CALayer()
border.backgroundColor = color.cgColor
border.frame = CGRect(x: 0, y: 0, width: self.frame.size.width, height: width)
self.layer.addSublayer(border)
}
func addRightBorderWithColor(color: UIColor, width: CGFloat) {
let border = CALayer()
border.backgroundColor = color.cgColor
border.frame = CGRect(x: self.frame.size.width - width, y: 0, width: width, height: self.frame.size.height)
self.layer.addSublayer(border)
}
func addBottomBorderWithColor(color: UIColor, width: CGFloat) {
let border = CALayer()
border.backgroundColor = color.cgColor
border.frame = CGRect(x: 0, y: self.frame.size.height - width, width: self.frame.size.width, height: width)
self.layer.addSublayer(border)
}
func addLeftBorderWithColor(color: UIColor, width: CGFloat) {
let border = CALayer()
border.backgroundColor = color.cgColor
border.frame = CGRect(x: 0, y: 0, width: width, height: self.frame.size.height)
self.layer.addSublayer(border)
}
}
夢里花落0921
TA貢獻(xiàn)1772條經(jīng)驗(yàn) 獲得超6個(gè)贊
在以下類別中實(shí)施：
UIButton + Border.h：
@interface UIButton (Border)
- (void)addBottomBorderWithColor: (UIColor *) color andWidth:(CGFloat) borderWidth;
- (void)addLeftBorderWithColor: (UIColor *) color andWidth:(CGFloat) borderWidth;
- (void)addRightBorderWithColor: (UIColor *) color andWidth:(CGFloat) borderWidth;
- (void)addTopBorderWithColor: (UIColor *) color andWidth:(CGFloat) borderWidth;
@end
UIButton + Border.m：
@implementation UIButton (Border)
- (void)addTopBorderWithColor:(UIColor *)color andWidth:(CGFloat) borderWidth {
CALayer *border = [CALayer layer];
border.backgroundColor = color.CGColor;
border.frame = CGRectMake(0, 0, self.frame.size.width, borderWidth);
[self.layer addSublayer:border];
}
- (void)addBottomBorderWithColor:(UIColor *)color andWidth:(CGFloat) borderWidth {
CALayer *border = [CALayer layer];
border.backgroundColor = color.CGColor;
border.frame = CGRectMake(0, self.frame.size.height - borderWidth, self.frame.size.width, borderWidth);
[self.layer addSublayer:border];
}
- (void)addLeftBorderWithColor:(UIColor *)color andWidth:(CGFloat) borderWidth {
CALayer *border = [CALayer layer];
border.backgroundColor = color.CGColor;
border.frame = CGRectMake(0, 0, borderWidth, self.frame.size.height);
[self.layer addSublayer:border];
}
- (void)addRightBorderWithColor:(UIColor *)color andWidth:(CGFloat) borderWidth {
CALayer *border = [CALayer layer];
border.backgroundColor = color.CGColor;
border.frame = CGRectMake(self.frame.size.width - borderWidth, 0, borderWidth, self.frame.size.height);
[self.layer addSublayer:border];
}
@end
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