效果图
说明：如效果图里的内容所示，该方法可以用
attributedTitle修改Title样式，用attributedMessage修改Msg样式，比如文本颜色/字体大小和对其方式/行间距等。
- (void)showAlertVC {
NSString *message = @"改Title样式用`attributedTitle`;改Msg样式用`attributedMessage`,比如文本颜色/字体大小和对其方式/行间距";
UIAlertController *alertVC = [UIAlertController alertControllerWithTitle:@"温馨提示" message:nil preferredStyle:UIAlertControllerStyleAlert];
NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
paragraphStyle.lineSpacing = 5;
paragraphStyle.alignment = NSTextAlignmentLeft;
NSMutableAttributedString *attributedTitle = [[NSMutableAttributedString alloc] initWithString:message];
NSDictionary *attributes = @{NSFontAttributeName: [UIFont systemFontOfSize:13],
NSForegroundColorAttributeName: [UIColor redColor],
NSParagraphStyleAttributeName : paragraphStyle};
[attributedTitle addAttributes:attributes range:NSMakeRange(0, message.length)];
[alertVC setValue:attributedTitle forKey:@"attributedMessage"];
UIAlertAction *okAction = [UIAlertAction actionWithTitle:@"装逼结束" style:UIAlertActionStyleDefault handler:nil];
[alertVC addAction:okAction];
[self presentViewController:alertVC animated:YES completion:nil];
}
扩展
需求：假如有一个数组里面放着多个Person对象，Person对象有age和height两个属性，我们需要根据Person的age对数组进行升序排列；如果age相同，则按照height升序排列。如：
| age（年龄递增排序） | height（年龄相同，就身高递增排序） |
|---|---|
| 7 | 174 |
| 8 | 154 |
| 8 | 156 |
| 8 | 171 |
| 9 | 145 |
实现代码：
#import "ViewController.h"
@interface Person : NSObject
@property (nonatomic, assign) NSInteger age;
@property (nonatomic, assign) CGFloat height;
- (instancetype)initWithAge:(NSInteger)age height:(CGFloat)height;
@end
@implementation Person
- (instancetype)initWithAge:(NSInteger)age height:(CGFloat)height {
if (self = [super init]) {
self.age = age;
self.height = height;
}
return self;
}
@end
@interface ViewController ()
@end
@implementation ViewController
- (IBAction)checkSOSAccessable {
NSArray *array = @[
[[Person alloc] initWithAge:11 height:22],
[[Person alloc] initWithAge:4 height:33],
[[Person alloc] initWithAge:24 height:26],
[[Person alloc] initWithAge:8 height:90],
[[Person alloc] initWithAge:11 height:20],
[[Person alloc] initWithAge:11 height:24],
[[Person alloc] initWithAge:11 height:22],
];
for (Person *person in array) {
NSLog(@"%ld---%.0f", person.age, person.height);
}
NSLog(@"======================");
NSSortDescriptor *descripor1 = [NSSortDescriptor sortDescriptorWithKey:@"age" ascending:YES];
NSSortDescriptor *descripor2 = [NSSortDescriptor sortDescriptorWithKey:@"height" ascending:YES];
array = [array sortedArrayUsingDescriptors:@[descripor1, descripor2]];
for (Person *person in array) {
NSLog(@"%ld---%.0f", person.age, person.height);
}
}
@end
打印
EmergencySOS[46129:817777] 11---22
EmergencySOS[46129:817777] 4---33
EmergencySOS[46129:817777] 24---26
EmergencySOS[46129:817777] 8---90
EmergencySOS[46129:817777] 11---20
EmergencySOS[46129:817777] 11---24
EmergencySOS[46129:817777] 11---22
EmergencySOS[46129:817777] =============
EmergencySOS[46129:817777] 4---33
EmergencySOS[46129:817777] 8---90
EmergencySOS[46129:817777] 11---20
EmergencySOS[46129:817777] 11---22
EmergencySOS[46129:817777] 11---22
EmergencySOS[46129:817777] 11---24
EmergencySOS[46129:817777] 24---26
