UITextView使用技巧(一)

最新推荐文章于 2021-04-19 16:35:16 发布

iteye_18480

最新推荐文章于 2021-04-19 16:35:16 发布

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本文详细介绍了iOS开发中如何配置和操作UITextView，包括文本内容、颜色、布局、字体、背景、可编辑性、键盘类型、交互性及圆角等关键属性的设置与应用。

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#import "ViewController.h"
#import <QuartzCore/QuartzCore.h>

@implementation ViewController
@synthesize myTextView;

- (void)viewDidLoad
{
    [super viewDidLoad];
	
    self.myTextView = [[[UITextView alloc] initWithFrame:CGRectMake(10.0f, 20.0f, 300.0f, 100.0f)] autorelease];
    myTextView.delegate = self;
    
    
    // 设置文本内容
    self.myTextView.text = @"Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World! Hello World!";
    
    // 设置文本颜色
    self.myTextView.textColor = [UIColor blackColor];
    
    // 文本靠左布局
    self.myTextView.textAlignment = NSTextAlignmentLeft;
    /*
     NSTextAlignmentLeft
     NSTextAlignmentCenter
     NSTextAlignmentRight
     */
    
    // 文本字体设置
    self.myTextView.font = [UIFont systemFontOfSize:17];
    
    // 背景颜色
    self.myTextView.backgroundColor = [UIColor whiteColor];
    
    // 文字内容是否可变
    self.myTextView.editable = YES;
    
    // 设置键盘类型
    self.myTextView.keyboardType = UIKeyboardTypeDefault;
    
    // 键盘出现的方式
    self.myTextView.keyboardAppearance = UIKeyboardAppearanceDefault;
    
    // 键盘return键类型
    self.myTextView.returnKeyType = UIReturnKeyDefault;
    
    // 是否可以滚动
    self.myTextView.scrollEnabled = YES;//是否可以拖动
    
    // 位置、大小自适应
    self.myTextView.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
    
    // 滚动指示条在textView中的位置,left设置无效
    self.myTextView.scrollIndicatorInsets = UIEdgeInsetsMake(13.0f, 0.0f, 14.0f, 7.0f);
    
    // 在不增大contentSize的情况下增大滚轴视图的可滚动区域
    self.myTextView.contentInset = UIEdgeInsetsMake(0.0f, 0.0f, 13.0f, 0.0f);
    
    // 是否滚动到顶部
    self.myTextView.scrollsToTop = NO;
    
    // 是否允许交互
    self.myTextView.userInteractionEnabled = YES;
    
    // 设置圆角,记得#import <QuartzCore/QuartzCore.h>
    self.myTextView.layer.cornerRadius = 6;
    self.myTextView.layer.masksToBounds = YES;
    
    [self.view addSubview:self.myTextView];
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    self.myTextView = nil;
}

- (void)dealloc
{
    self.myTextView = nil;
    [super dealloc];
}

UITextViewDelegate

● -textViewShouldBeginEditing:
● -textViewShouldEndEditing:
● -textViewDidBeginEditing:
● -textViewDidEndEditing:
● -textView: shouldChangeTextInRange: replacementText:
● -textViewDidChange:
● -textViewDidChangeSelection: