IOS6 控件专辑
IOS 控件专辑
UITextView控件
1. 创建并初始化
创建UITextView的文件,并在.h文件中写入如下代码:
//==============================================================================
#import <UIKit/UIKit.h>
@interface TextViewController : UIViewController <UITextViewDelegate>
@property (nonatomic, weak) UITextView *textView;
@end
//==============================================================================
在.m文件中初始化这个textview,写入代码如下:
//初始化大小并自动释放
self.textView = [[UITextView alloc] initWithFrame:self.view.frame];
//设置textview里面的字体颜色
self.textView.textColor = [UIColor blackColor];
//设置字体名字和字体大小
self.textView.font = [UIFont fontWithName:@"Arial" size:18.0];
//设置它的委托方法
self.textView.delegate =self;
//设置它的背景颜色
self.textView.backgroundColor = [UIColor whiteColor];
//设置它显示的内容
self.textView.text =@"Now is the time for all good developers tocome to serve their country.\n\nNow is the time for all good developers to cometo serve their country.";
//返回键的类型
self.textView.returnKeyType = UIReturnKeyDefault;
//键盘类型
self.textView.keyboardType = UIKeyboardTypeDefault;
//是否可以拖动
self.textView.scrollEnabled =YES;
//自适应高度
self.textView.autoresizingMask = UIViewAutoresizingFlexibleHeight;
//加入到整个页面中
[self.view addSubview:self.textView];
2.设置UITextView圆角问题
引用#import QuartzCore/QuartzCore.h后,
调用[textView.layer setCornerRadius:10];设定UITextView圓角
3. UITextView根据文本大小自适应高度
通过实现文本字数来确定高度,如下:
NSString * desc = @"Description it is a test font, and don't become angry for which i use to do here.Now here is a very nice party from american or not!";
CGSize size = [desc sizeWithFont:[UIFont systemFontOfSize:14.0f]
constrainedToSize:CGSizeMake(FLT_MAX,21.0)
lineBreakMode:NSLineBreakByWordWrapping];
4. UITextView退出键盘的几种方式
因为你点击UITextView会出现键盘,如果你退出键盘,有如下几种方式:
(1)如果你程序是有导航条的,可以在导航条上面加多一个Done的按钮,用来退出键盘,当然要先实UITextViewDelegate。
代码如下:
- (void)textViewDidBeginEditing:(UITextView *)textView
{
UIBarButtonItem *done = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(leaveEditMode)];
self.navigationItem.rightBarButtonItem = done;
}
- (void)textViewDidEndEditing:(UITextView *)textView
{
self.navigationItem.rightBarButtonItem = nil;
}
- (void)leaveEditMode
{
[self.textView resignFirstResponder];
}
(2)如果你的textview里不用回车键,可以把回车键当做退出键盘的响应键。
代码如下:
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