Objective-C语言——UILabel标签

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
[super viewDidLoad];

//获取屏幕的尺寸
//    UIScreen *screen = [UIScreen mainScreen];
//    CGFloat width = screen.bounds.size.width; //宽
//    CGFloat height = screen.bounds.size.height; //高
////或
//    CGFloat width = [UIScreen mainScreen].bounds.size.width; // 宽
//    CGFloat height = [UIScreen mainScreen].bounds.size.height; //高

//UILabel
//初始化
UILabel *label = [[UILabel alloc] initWithFrame:CGRectZero];
//    UILabel *label = [[UILabel alloc] init];

label.frame = CGRectMake(ScreenWidth/2-150, ScreenHeight/2-150, 300, 300);

//文本内容
label.text = @"Don't be a woman that needs a man, Be a woman a man needs.Don't be a woman that needs a man, Be a woman a man needs.Don't be a ";

//字体大小
label.font = [UIFont systemFontOfSize:30];

//找出所有的字体样式
NSArray *familyNamesArray = [UIFont familyNames];
NSLog(@"%@",familyNamesArray);

for (NSString *a in [UIFont familyNames]) {
NSLog(@"%@",a);

}

//只对英文和数字有效
label.font = [UIFont fontWithName:@"Bodoni 72 Oldstyle" size:32];

//加粗
label.font = [UIFont boldSystemFontOfSize:20];

//文本颜色
label.textColor = [UIColor yellowColor];

//在 label 中使文本换行
label.numberOfLines = 0; //0代表不限制label 的行数

//文本对齐方式，默认是NSTextAlignmentLeft,   textAlignment是枚举
//    label.textAlignment = NSTextAlignmentCenter; // label.textAlignment = 1;

//设置文本过长时的显示格式
//    label.lineBreakMode = NSLineBreakByTruncatingMiddle;//  "ab...yz"

//label 背景颜色
label.backgroundColor = [UIColor purpleColor];

//view 背景颜色
self.view.backgroundColor = [UIColor yellowColor];

//Label文字大小自适应
[label sizeToFit];

//    //边框
//    label.layer.borderColor = [[UIColor magentaColor] CGColor];
//    label.layer.borderWidth = 5;
//

label.enabled = NO;

//显示在 view
[self.view addSubview:label];

//初始化
UILabel *label1 = [[UILabel alloc] initWithFrame:CGRectZero];

NSString *string = @"Don't be a woman that needs a man, Be a woman a man needs.Don't be a woman that needs a man, Be a woman a man needs.Don't be a woman that needs a man, Be a woman a man needs.Don't be a woman that needs a man, Be a woman a man needs.Don't be a woman that needs a man, Be a woman a man needs.Don't be a woman that needs a man, Be a woman a man needs.";
label1.text = string;

label1.frame = CGRectMake(ScreenWidth/2-150, ScreenHeight/2-150, 300, 300);

label1.backgroundColor = [UIColor blueColor];

label1.font = [UIFont systemFontOfSize:18];

CGSize size = [string sizeWithAttributes:@{NSFontAttributeName:label1.font}];

label1.frame = CGRectMake(ScreenWidth/2 - size.width/2, ScreenHeight/2 - size.height/2, size.width, size.height);

//    [self.view addSubview:label1];

}

- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}

@end